Home / 13,127.47-18,115.57-7,159.25

Finding the Fourth Proportional to 13,127.47, 18,115.57 and 7,159.25

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Solution

The fourth proportional to 13,127.47, 18,115.57 and 7,159.25 is: 9,879.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.47 : 18,115.57 = 7,159.25 : x
  2. Step 2: Convert to fraction form
    13,127.47/18,115.57 = 7,159.25/x
  3. Step 3: Cross multiply
    13,127.47x = 18,115.57 × 7,159.25
  4. Step 4: Simplify right side
    13,127.47x = 129,693,894.52
  5. Step 5: Solve for x
    x = 129,693,894.52/13,127.47
  6. Step 6: Final answer
    x = 9,879.58

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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.