Home / 10,639.76-14,691.48-6,864.80

Finding the Fourth Proportional to 10,639.76, 14,691.48 and 6,864.80

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Solution

The fourth proportional to 10,639.76, 14,691.48 and 6,864.80 is: 9,478.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639.76 : 14,691.48 = 6,864.80 : x
  2. Step 2: Convert to fraction form
    10,639.76/14,691.48 = 6,864.80/x
  3. Step 3: Cross multiply
    10,639.76x = 14,691.48 × 6,864.80
  4. Step 4: Simplify right side
    10,639.76x = 100,854,071.90
  5. Step 5: Solve for x
    x = 100,854,071.90/10,639.76
  6. Step 6: Final answer
    x = 9,478.98

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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.