Home / 12,390.16-17,098.80-6,801.28

Finding the Fourth Proportional to 12,390.16, 17,098.80 and 6,801.28

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Solution

The fourth proportional to 12,390.16, 17,098.80 and 6,801.28 is: 9,385.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.16 : 17,098.80 = 6,801.28 : x
  2. Step 2: Convert to fraction form
    12,390.16/17,098.80 = 6,801.28/x
  3. Step 3: Cross multiply
    12,390.16x = 17,098.80 × 6,801.28
  4. Step 4: Simplify right side
    12,390.16x = 116,293,726.46
  5. Step 5: Solve for x
    x = 116,293,726.46/12,390.16
  6. Step 6: Final answer
    x = 9,385.97

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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.