Home / 15,425.40-21,287.43-8,711.16

Finding the Fourth Proportional to 15,425.40, 21,287.43 and 8,711.16

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Solution

The fourth proportional to 15,425.40, 21,287.43 and 8,711.16 is: 12,021.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,425.40 : 21,287.43 = 8,711.16 : x
  2. Step 2: Convert to fraction form
    15,425.40/21,287.43 = 8,711.16/x
  3. Step 3: Cross multiply
    15,425.40x = 21,287.43 × 8,711.16
  4. Step 4: Simplify right side
    15,425.40x = 185,438,208.72
  5. Step 5: Solve for x
    x = 185,438,208.72/15,425.40
  6. Step 6: Final answer
    x = 12,021.61

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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.