Home / 18,780.47-25,915.28-11,225.29

Finding the Fourth Proportional to 18,780.47, 25,915.28 and 11,225.29

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Solution

The fourth proportional to 18,780.47, 25,915.28 and 11,225.29 is: 15,489.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.47 : 25,915.28 = 11,225.29 : x
  2. Step 2: Convert to fraction form
    18,780.47/25,915.28 = 11,225.29/x
  3. Step 3: Cross multiply
    18,780.47x = 25,915.28 × 11,225.29
  4. Step 4: Simplify right side
    18,780.47x = 290,906,412.52
  5. Step 5: Solve for x
    x = 290,906,412.52/18,780.47
  6. Step 6: Final answer
    x = 15,489.83

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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.