Home / 28,618.97-42,930.36-9,900.81

Finding the Fourth Proportional to 28,618.97, 42,930.36 and 9,900.81

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Solution

The fourth proportional to 28,618.97, 42,930.36 and 9,900.81 is: 14,851.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.97 : 42,930.36 = 9,900.81 : x
  2. Step 2: Convert to fraction form
    28,618.97/42,930.36 = 9,900.81/x
  3. Step 3: Cross multiply
    28,618.97x = 42,930.36 × 9,900.81
  4. Step 4: Simplify right side
    28,618.97x = 425,045,337.59
  5. Step 5: Solve for x
    x = 425,045,337.59/28,618.97
  6. Step 6: Final answer
    x = 14,851.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.