Home / 11,220.47-15,479.91-6,438.68

Finding the Fourth Proportional to 11,220.47, 15,479.91 and 6,438.68

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Solution

The fourth proportional to 11,220.47, 15,479.91 and 6,438.68 is: 8,882.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220.47 : 15,479.91 = 6,438.68 : x
  2. Step 2: Convert to fraction form
    11,220.47/15,479.91 = 6,438.68/x
  3. Step 3: Cross multiply
    11,220.47x = 15,479.91 × 6,438.68
  4. Step 4: Simplify right side
    11,220.47x = 99,670,254.64
  5. Step 5: Solve for x
    x = 99,670,254.64/11,220.47
  6. Step 6: Final answer
    x = 8,882.90

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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.