Home / 10,215.24-15,331.92-5,288.40

Finding the Fourth Proportional to 10,215.24, 15,331.92 and 5,288.40

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Solution

The fourth proportional to 10,215.24, 15,331.92 and 5,288.40 is: 7,937.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215.24 : 15,331.92 = 5,288.40 : x
  2. Step 2: Convert to fraction form
    10,215.24/15,331.92 = 5,288.40/x
  3. Step 3: Cross multiply
    10,215.24x = 15,331.92 × 5,288.40
  4. Step 4: Simplify right side
    10,215.24x = 81,081,325.73
  5. Step 5: Solve for x
    x = 81,081,325.73/10,215.24
  6. Step 6: Final answer
    x = 7,937.29

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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.