Home / 21,569.52-29,766-12,138.24

Finding the Fourth Proportional to 21,569.52, 29,766 and 12,138.24

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Solution

The fourth proportional to 21,569.52, 29,766 and 12,138.24 is: 16,750.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,569.52 : 29,766 = 12,138.24 : x
  2. Step 2: Convert to fraction form
    21,569.52/29,766 = 12,138.24/x
  3. Step 3: Cross multiply
    21,569.52x = 29,766 × 12,138.24
  4. Step 4: Simplify right side
    21,569.52x = 361,306,851.84
  5. Step 5: Solve for x
    x = 361,306,851.84/21,569.52
  6. Step 6: Final answer
    x = 16,750.81

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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.