Home / 13,127.70-18,115.56-7,159.32

Finding the Fourth Proportional to 13,127.70, 18,115.56 and 7,159.32

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Solution

The fourth proportional to 13,127.70, 18,115.56 and 7,159.32 is: 9,879.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.70 : 18,115.56 = 7,159.32 : x
  2. Step 2: Convert to fraction form
    13,127.70/18,115.56 = 7,159.32/x
  3. Step 3: Cross multiply
    13,127.70x = 18,115.56 × 7,159.32
  4. Step 4: Simplify right side
    13,127.70x = 129,695,091.02
  5. Step 5: Solve for x
    x = 129,695,091.02/13,127.70
  6. Step 6: Final answer
    x = 9,879.50

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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.