Home / 15,423.39-21,264.39-12,587.85

Finding the Fourth Proportional to 15,423.39, 21,264.39 and 12,587.85

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Solution

The fourth proportional to 15,423.39, 21,264.39 and 12,587.85 is: 17,355.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,423.39 : 21,264.39 = 12,587.85 : x
  2. Step 2: Convert to fraction form
    15,423.39/21,264.39 = 12,587.85/x
  3. Step 3: Cross multiply
    15,423.39x = 21,264.39 × 12,587.85
  4. Step 4: Simplify right side
    15,423.39x = 267,672,951.66
  5. Step 5: Solve for x
    x = 267,672,951.66/15,423.39
  6. Step 6: Final answer
    x = 17,355.00

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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.