Home / 28,358.90-42,540.30-9,631.29

Finding the Fourth Proportional to 28,358.90, 42,540.30 and 9,631.29

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Solution

The fourth proportional to 28,358.90, 42,540.30 and 9,631.29 is: 14,447.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.90 : 42,540.30 = 9,631.29 : x
  2. Step 2: Convert to fraction form
    28,358.90/42,540.30 = 9,631.29/x
  3. Step 3: Cross multiply
    28,358.90x = 42,540.30 × 9,631.29
  4. Step 4: Simplify right side
    28,358.90x = 409,717,965.99
  5. Step 5: Solve for x
    x = 409,717,965.99/28,358.90
  6. Step 6: Final answer
    x = 14,447.60

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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.