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Finding the Fourth Proportional to 15,803.54, 21,809.52 and 9,089.16

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Solution

The fourth proportional to 15,803.54, 21,809.52 and 9,089.16 is: 12,543.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,803.54 : 21,809.52 = 9,089.16 : x
  2. Step 2: Convert to fraction form
    15,803.54/21,809.52 = 9,089.16/x
  3. Step 3: Cross multiply
    15,803.54x = 21,809.52 × 9,089.16
  4. Step 4: Simplify right side
    15,803.54x = 198,230,219.35
  5. Step 5: Solve for x
    x = 198,230,219.35/15,803.54
  6. Step 6: Final answer
    x = 12,543.40

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Half scale
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Double scale
Find fourth proportional to 15,804.54, 21,810.90 and 9,090.16
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.