Home / 12,425.86-17,148.16-7,121.70

Finding the Fourth Proportional to 12,425.86, 17,148.16 and 7,121.70

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Solution

The fourth proportional to 12,425.86, 17,148.16 and 7,121.70 is: 9,828.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.86 : 17,148.16 = 7,121.70 : x
  2. Step 2: Convert to fraction form
    12,425.86/17,148.16 = 7,121.70/x
  3. Step 3: Cross multiply
    12,425.86x = 17,148.16 × 7,121.70
  4. Step 4: Simplify right side
    12,425.86x = 122,124,033.27
  5. Step 5: Solve for x
    x = 122,124,033.27/12,425.86
  6. Step 6: Final answer
    x = 9,828.22

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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.