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Finding the Fourth Proportional to 12,917.40, 19,332.90 and 9,029.40

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Solution

The fourth proportional to 12,917.40, 19,332.90 and 9,029.40 is: 13,513.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,917.40 : 19,332.90 = 9,029.40 : x
  2. Step 2: Convert to fraction form
    12,917.40/19,332.90 = 9,029.40/x
  3. Step 3: Cross multiply
    12,917.40x = 19,332.90 × 9,029.40
  4. Step 4: Simplify right side
    12,917.40x = 174,564,487.26
  5. Step 5: Solve for x
    x = 174,564,487.26/12,917.40
  6. Step 6: Final answer
    x = 13,513.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.