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Finding the Fourth Proportional to 14,802.72, 20,418.08 and 9,489.12

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Solution

The fourth proportional to 14,802.72, 20,418.08 and 9,489.12 is: 13,088.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,802.72 : 20,418.08 = 9,489.12 : x
  2. Step 2: Convert to fraction form
    14,802.72/20,418.08 = 9,489.12/x
  3. Step 3: Cross multiply
    14,802.72x = 20,418.08 × 9,489.12
  4. Step 4: Simplify right side
    14,802.72x = 193,749,611.29
  5. Step 5: Solve for x
    x = 193,749,611.29/14,802.72
  6. Step 6: Final answer
    x = 13,088.78

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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.