Home / 12,816.24-17,685.80-7,151.44

Finding the Fourth Proportional to 12,816.24, 17,685.80 and 7,151.44

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Solution

The fourth proportional to 12,816.24, 17,685.80 and 7,151.44 is: 9,868.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,816.24 : 17,685.80 = 7,151.44 : x
  2. Step 2: Convert to fraction form
    12,816.24/17,685.80 = 7,151.44/x
  3. Step 3: Cross multiply
    12,816.24x = 17,685.80 × 7,151.44
  4. Step 4: Simplify right side
    12,816.24x = 126,478,937.55
  5. Step 5: Solve for x
    x = 126,478,937.55/12,816.24
  6. Step 6: Final answer
    x = 9,868.65

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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.