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Finding the Fourth Proportional to 15,803.58, 21,810.09 and 9,091.32

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Solution

The fourth proportional to 15,803.58, 21,810.09 and 9,091.32 is: 12,546.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,803.58 : 21,810.09 = 9,091.32 : x
  2. Step 2: Convert to fraction form
    15,803.58/21,810.09 = 9,091.32/x
  3. Step 3: Cross multiply
    15,803.58x = 21,810.09 × 9,091.32
  4. Step 4: Simplify right side
    15,803.58x = 198,282,459.72
  5. Step 5: Solve for x
    x = 198,282,459.72/15,803.58
  6. Step 6: Final answer
    x = 12,546.68

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Double scale
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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.