Home / 21,820.38-32,737.12-7,778.58

Finding the Fourth Proportional to 21,820.38, 32,737.12 and 7,778.58

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Solution

The fourth proportional to 21,820.38, 32,737.12 and 7,778.58 is: 11,670.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,820.38 : 32,737.12 = 7,778.58 : x
  2. Step 2: Convert to fraction form
    21,820.38/32,737.12 = 7,778.58/x
  3. Step 3: Cross multiply
    21,820.38x = 32,737.12 × 7,778.58
  4. Step 4: Simplify right side
    21,820.38x = 254,648,306.89
  5. Step 5: Solve for x
    x = 254,648,306.89/21,820.38
  6. Step 6: Final answer
    x = 11,670.20

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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.