Home / 21,569.59-29,765.97-12,138.15

Finding the Fourth Proportional to 21,569.59, 29,765.97 and 12,138.15

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Solution

The fourth proportional to 21,569.59, 29,765.97 and 12,138.15 is: 16,750.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,569.59 : 29,765.97 = 12,138.15 : x
  2. Step 2: Convert to fraction form
    21,569.59/29,765.97 = 12,138.15/x
  3. Step 3: Cross multiply
    21,569.59x = 29,765.97 × 12,138.15
  4. Step 4: Simplify right side
    21,569.59x = 361,303,808.76
  5. Step 5: Solve for x
    x = 361,303,808.76/21,569.59
  6. Step 6: Final answer
    x = 16,750.61

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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.