Home / 15,425.79-21,285.29-8,711.28

Finding the Fourth Proportional to 15,425.79, 21,285.29 and 8,711.28

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Solution

The fourth proportional to 15,425.79, 21,285.29 and 8,711.28 is: 12,020.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,425.79 : 21,285.29 = 8,711.28 : x
  2. Step 2: Convert to fraction form
    15,425.79/21,285.29 = 8,711.28/x
  3. Step 3: Cross multiply
    15,425.79x = 21,285.29 × 8,711.28
  4. Step 4: Simplify right side
    15,425.79x = 185,422,121.07
  5. Step 5: Solve for x
    x = 185,422,121.07/15,425.79
  6. Step 6: Final answer
    x = 12,020.27

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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.