Home / 15,521.32-21,419.88-8,807.20

Finding the Fourth Proportional to 15,521.32, 21,419.88 and 8,807.20

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Solution

The fourth proportional to 15,521.32, 21,419.88 and 8,807.20 is: 12,154.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.32 : 21,419.88 = 8,807.20 : x
  2. Step 2: Convert to fraction form
    15,521.32/21,419.88 = 8,807.20/x
  3. Step 3: Cross multiply
    15,521.32x = 21,419.88 × 8,807.20
  4. Step 4: Simplify right side
    15,521.32x = 188,649,167.14
  5. Step 5: Solve for x
    x = 188,649,167.14/15,521.32
  6. Step 6: Final answer
    x = 12,154.20

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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.