Home / 18,781.58-28,170.20-4,931.66

Finding the Fourth Proportional to 18,781.58, 28,170.20 and 4,931.66

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Solution

The fourth proportional to 18,781.58, 28,170.20 and 4,931.66 is: 7,396.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.58 : 28,170.20 = 4,931.66 : x
  2. Step 2: Convert to fraction form
    18,781.58/28,170.20 = 4,931.66/x
  3. Step 3: Cross multiply
    18,781.58x = 28,170.20 × 4,931.66
  4. Step 4: Simplify right side
    18,781.58x = 138,925,848.53
  5. Step 5: Solve for x
    x = 138,925,848.53/18,781.58
  6. Step 6: Final answer
    x = 7,396.92

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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.