Home / 10,639.48-15,959.76-3,977.68

Finding the Fourth Proportional to 10,639.48, 15,959.76 and 3,977.68

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Solution

The fourth proportional to 10,639.48, 15,959.76 and 3,977.68 is: 5,966.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639.48 : 15,959.76 = 3,977.68 : x
  2. Step 2: Convert to fraction form
    10,639.48/15,959.76 = 3,977.68/x
  3. Step 3: Cross multiply
    10,639.48x = 15,959.76 × 3,977.68
  4. Step 4: Simplify right side
    10,639.48x = 63,482,818.16
  5. Step 5: Solve for x
    x = 63,482,818.16/10,639.48
  6. Step 6: Final answer
    x = 5,966.72

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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.