Home / 10,115.11-15,146.08-8,130.20

Finding the Fourth Proportional to 10,115.11, 15,146.08 and 8,130.20

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Solution

The fourth proportional to 10,115.11, 15,146.08 and 8,130.20 is: 12,173.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,115.11 : 15,146.08 = 8,130.20 : x
  2. Step 2: Convert to fraction form
    10,115.11/15,146.08 = 8,130.20/x
  3. Step 3: Cross multiply
    10,115.11x = 15,146.08 × 8,130.20
  4. Step 4: Simplify right side
    10,115.11x = 123,140,677.16
  5. Step 5: Solve for x
    x = 123,140,677.16/10,115.11
  6. Step 6: Final answer
    x = 12,173.94

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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.