Home / 12,428.52-17,151.80-7,124.36

Finding the Fourth Proportional to 12,428.52, 17,151.80 and 7,124.36

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Solution

The fourth proportional to 12,428.52, 17,151.80 and 7,124.36 is: 9,831.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.52 : 17,151.80 = 7,124.36 : x
  2. Step 2: Convert to fraction form
    12,428.52/17,151.80 = 7,124.36/x
  3. Step 3: Cross multiply
    12,428.52x = 17,151.80 × 7,124.36
  4. Step 4: Simplify right side
    12,428.52x = 122,195,597.85
  5. Step 5: Solve for x
    x = 122,195,597.85/12,428.52
  6. Step 6: Final answer
    x = 9,831.87

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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.