Home / 20,990.22-31,484.28-5,195.16

Finding the Fourth Proportional to 20,990.22, 31,484.28 and 5,195.16

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Solution

The fourth proportional to 20,990.22, 31,484.28 and 5,195.16 is: 7,792.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.22 : 31,484.28 = 5,195.16 : x
  2. Step 2: Convert to fraction form
    20,990.22/31,484.28 = 5,195.16/x
  3. Step 3: Cross multiply
    20,990.22x = 31,484.28 × 5,195.16
  4. Step 4: Simplify right side
    20,990.22x = 163,565,872.08
  5. Step 5: Solve for x
    x = 163,565,872.08/20,990.22
  6. Step 6: Final answer
    x = 7,792.48

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1.5x scale

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.