Home / 10,287.86-15,405.44-7,120.92

Finding the Fourth Proportional to 10,287.86, 15,405.44 and 7,120.92

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Solution

The fourth proportional to 10,287.86, 15,405.44 and 7,120.92 is: 10,663.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,287.86 : 15,405.44 = 7,120.92 : x
  2. Step 2: Convert to fraction form
    10,287.86/15,405.44 = 7,120.92/x
  3. Step 3: Cross multiply
    10,287.86x = 15,405.44 × 7,120.92
  4. Step 4: Simplify right side
    10,287.86x = 109,700,793.17
  5. Step 5: Solve for x
    x = 109,700,793.17/10,287.86
  6. Step 6: Final answer
    x = 10,663.13

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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.