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Finding the Fourth Proportional to 12,087.70, 18,109.95 and 10,359.70

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Solution

The fourth proportional to 12,087.70, 18,109.95 and 10,359.70 is: 15,521.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087.70 : 18,109.95 = 10,359.70 : x
  2. Step 2: Convert to fraction form
    12,087.70/18,109.95 = 10,359.70/x
  3. Step 3: Cross multiply
    12,087.70x = 18,109.95 × 10,359.70
  4. Step 4: Simplify right side
    12,087.70x = 187,613,649.02
  5. Step 5: Solve for x
    x = 187,613,649.02/12,087.70
  6. Step 6: Final answer
    x = 15,521.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.