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Finding the Fourth Proportional to 19,803.54, 27,328.80 and 10,728.90

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Solution

The fourth proportional to 19,803.54, 27,328.80 and 10,728.90 is: 14,805.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,803.54 : 27,328.80 = 10,728.90 : x
  2. Step 2: Convert to fraction form
    19,803.54/27,328.80 = 10,728.90/x
  3. Step 3: Cross multiply
    19,803.54x = 27,328.80 × 10,728.90
  4. Step 4: Simplify right side
    19,803.54x = 293,207,962.32
  5. Step 5: Solve for x
    x = 293,207,962.32/19,803.54
  6. Step 6: Final answer
    x = 14,805.84

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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.