Home / 20,934.10-28,888.45-11,981.29

Finding the Fourth Proportional to 20,934.10, 28,888.45 and 11,981.29

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Solution

The fourth proportional to 20,934.10, 28,888.45 and 11,981.29 is: 16,533.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.10 : 28,888.45 = 11,981.29 : x
  2. Step 2: Convert to fraction form
    20,934.10/28,888.45 = 11,981.29/x
  3. Step 3: Cross multiply
    20,934.10x = 28,888.45 × 11,981.29
  4. Step 4: Simplify right side
    20,934.10x = 346,120,897.10
  5. Step 5: Solve for x
    x = 346,120,897.10/20,934.10
  6. Step 6: Final answer
    x = 16,533.83

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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.