Home / 13,517.52-18,667.02-12,781.20

Finding the Fourth Proportional to 13,517.52, 18,667.02 and 12,781.20

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Solution

The fourth proportional to 13,517.52, 18,667.02 and 12,781.20 is: 17,650.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,517.52 : 18,667.02 = 12,781.20 : x
  2. Step 2: Convert to fraction form
    13,517.52/18,667.02 = 12,781.20/x
  3. Step 3: Cross multiply
    13,517.52x = 18,667.02 × 12,781.20
  4. Step 4: Simplify right side
    13,517.52x = 238,586,916.02
  5. Step 5: Solve for x
    x = 238,586,916.02/13,517.52
  6. Step 6: Final answer
    x = 17,650.20

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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.