Home / 20,311.18-28,032.60-12,355.90

Finding the Fourth Proportional to 20,311.18, 28,032.60 and 12,355.90

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Solution

The fourth proportional to 20,311.18, 28,032.60 and 12,355.90 is: 17,053.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.18 : 28,032.60 = 12,355.90 : x
  2. Step 2: Convert to fraction form
    20,311.18/28,032.60 = 12,355.90/x
  3. Step 3: Cross multiply
    20,311.18x = 28,032.60 × 12,355.90
  4. Step 4: Simplify right side
    20,311.18x = 346,368,002.34
  5. Step 5: Solve for x
    x = 346,368,002.34/20,311.18
  6. Step 6: Final answer
    x = 17,053.07

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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.