Home / 15,990.32-22,066.47-8,820.20

Finding the Fourth Proportional to 15,990.32, 22,066.47 and 8,820.20

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Solution

The fourth proportional to 15,990.32, 22,066.47 and 8,820.20 is: 12,171.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,990.32 : 22,066.47 = 8,820.20 : x
  2. Step 2: Convert to fraction form
    15,990.32/22,066.47 = 8,820.20/x
  3. Step 3: Cross multiply
    15,990.32x = 22,066.47 × 8,820.20
  4. Step 4: Simplify right side
    15,990.32x = 194,630,568.36
  5. Step 5: Solve for x
    x = 194,630,568.36/15,990.32
  6. Step 6: Final answer
    x = 12,171.78

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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.