Home / 20,977.12-28,948.62-11,545.72

Finding the Fourth Proportional to 20,977.12, 28,948.62 and 11,545.72

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Solution

The fourth proportional to 20,977.12, 28,948.62 and 11,545.72 is: 15,933.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.12 : 28,948.62 = 11,545.72 : x
  2. Step 2: Convert to fraction form
    20,977.12/28,948.62 = 11,545.72/x
  3. Step 3: Cross multiply
    20,977.12x = 28,948.62 × 11,545.72
  4. Step 4: Simplify right side
    20,977.12x = 334,232,660.91
  5. Step 5: Solve for x
    x = 334,232,660.91/20,977.12
  6. Step 6: Final answer
    x = 15,933.20

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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.