Home / 20,934.35-28,888.80-11,981.55

Finding the Fourth Proportional to 20,934.35, 28,888.80 and 11,981.55

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Solution

The fourth proportional to 20,934.35, 28,888.80 and 11,981.55 is: 16,534.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.35 : 28,888.80 = 11,981.55 : x
  2. Step 2: Convert to fraction form
    20,934.35/28,888.80 = 11,981.55/x
  3. Step 3: Cross multiply
    20,934.35x = 28,888.80 × 11,981.55
  4. Step 4: Simplify right side
    20,934.35x = 346,132,601.64
  5. Step 5: Solve for x
    x = 346,132,601.64/20,934.35
  6. Step 6: Final answer
    x = 16,534.19

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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.