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Finding the Fourth Proportional to 18,114.53, 24,971.80 and 12,720.54

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Solution

The fourth proportional to 18,114.53, 24,971.80 and 12,720.54 is: 17,535.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,114.53 : 24,971.80 = 12,720.54 : x
  2. Step 2: Convert to fraction form
    18,114.53/24,971.80 = 12,720.54/x
  3. Step 3: Cross multiply
    18,114.53x = 24,971.80 × 12,720.54
  4. Step 4: Simplify right side
    18,114.53x = 317,654,655.91
  5. Step 5: Solve for x
    x = 317,654,655.91/18,114.53
  6. Step 6: Final answer
    x = 17,535.91

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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.