Home / 12,686.60-17,488.88-8,898.28

Finding the Fourth Proportional to 12,686.60, 17,488.88 and 8,898.28

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Solution

The fourth proportional to 12,686.60, 17,488.88 and 8,898.28 is: 12,266.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.60 : 17,488.88 = 8,898.28 : x
  2. Step 2: Convert to fraction form
    12,686.60/17,488.88 = 8,898.28/x
  3. Step 3: Cross multiply
    12,686.60x = 17,488.88 × 8,898.28
  4. Step 4: Simplify right side
    12,686.60x = 155,620,951.13
  5. Step 5: Solve for x
    x = 155,620,951.13/12,686.60
  6. Step 6: Final answer
    x = 12,266.56

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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.