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Finding the Fourth Proportional to 14,985.55, 20,687.55 and 9,322.12

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Solution

The fourth proportional to 14,985.55, 20,687.55 and 9,322.12 is: 12,869.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,985.55 : 20,687.55 = 9,322.12 : x
  2. Step 2: Convert to fraction form
    14,985.55/20,687.55 = 9,322.12/x
  3. Step 3: Cross multiply
    14,985.55x = 20,687.55 × 9,322.12
  4. Step 4: Simplify right side
    14,985.55x = 192,851,823.61
  5. Step 5: Solve for x
    x = 192,851,823.61/14,985.55
  6. Step 6: Final answer
    x = 12,869.19

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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.