Home / 10,085.30-15,131.03-5,158.40

Finding the Fourth Proportional to 10,085.30, 15,131.03 and 5,158.40

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Solution

The fourth proportional to 10,085.30, 15,131.03 and 5,158.40 is: 7,739.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,085.30 : 15,131.03 = 5,158.40 : x
  2. Step 2: Convert to fraction form
    10,085.30/15,131.03 = 5,158.40/x
  3. Step 3: Cross multiply
    10,085.30x = 15,131.03 × 5,158.40
  4. Step 4: Simplify right side
    10,085.30x = 78,051,905.15
  5. Step 5: Solve for x
    x = 78,051,905.15/10,085.30
  6. Step 6: Final answer
    x = 7,739.18

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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.