Home / 13,127.32-18,115.65-7,158.93

Finding the Fourth Proportional to 13,127.32, 18,115.65 and 7,158.93

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Solution

The fourth proportional to 13,127.32, 18,115.65 and 7,158.93 is: 9,879.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.32 : 18,115.65 = 7,158.93 : x
  2. Step 2: Convert to fraction form
    13,127.32/18,115.65 = 7,158.93/x
  3. Step 3: Cross multiply
    13,127.32x = 18,115.65 × 7,158.93
  4. Step 4: Simplify right side
    13,127.32x = 129,688,704.22
  5. Step 5: Solve for x
    x = 129,688,704.22/13,127.32
  6. Step 6: Final answer
    x = 9,879.30

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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.