Home / 13,127.29-18,115.81-7,158.90

Finding the Fourth Proportional to 13,127.29, 18,115.81 and 7,158.90

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Solution

The fourth proportional to 13,127.29, 18,115.81 and 7,158.90 is: 9,879.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.29 : 18,115.81 = 7,158.90 : x
  2. Step 2: Convert to fraction form
    13,127.29/18,115.81 = 7,158.90/x
  3. Step 3: Cross multiply
    13,127.29x = 18,115.81 × 7,158.90
  4. Step 4: Simplify right side
    13,127.29x = 129,689,254.31
  5. Step 5: Solve for x
    x = 129,689,254.31/13,127.29
  6. Step 6: Final answer
    x = 9,879.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.