Home / 10,487.69-15,731.47-4,247.61

Finding the Fourth Proportional to 10,487.69, 15,731.47 and 4,247.61

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Solution

The fourth proportional to 10,487.69, 15,731.47 and 4,247.61 is: 6,371.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,487.69 : 15,731.47 = 4,247.61 : x
  2. Step 2: Convert to fraction form
    10,487.69/15,731.47 = 4,247.61/x
  3. Step 3: Cross multiply
    10,487.69x = 15,731.47 × 4,247.61
  4. Step 4: Simplify right side
    10,487.69x = 66,821,071.71
  5. Step 5: Solve for x
    x = 66,821,071.71/10,487.69
  6. Step 6: Final answer
    x = 6,371.38

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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.