Home / 19,712.80-29,569.20-13,117.60

Finding the Fourth Proportional to 19,712.80, 29,569.20 and 13,117.60

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Solution

The fourth proportional to 19,712.80, 29,569.20 and 13,117.60 is: 19,676.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,712.80 : 29,569.20 = 13,117.60 : x
  2. Step 2: Convert to fraction form
    19,712.80/29,569.20 = 13,117.60/x
  3. Step 3: Cross multiply
    19,712.80x = 29,569.20 × 13,117.60
  4. Step 4: Simplify right side
    19,712.80x = 387,876,937.92
  5. Step 5: Solve for x
    x = 387,876,937.92/19,712.80
  6. Step 6: Final answer
    x = 19,676.40

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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.