Home / 20,808.35-28,715.56-11,377.52

Finding the Fourth Proportional to 20,808.35, 28,715.56 and 11,377.52

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Solution

The fourth proportional to 20,808.35, 28,715.56 and 11,377.52 is: 15,700.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.35 : 28,715.56 = 11,377.52 : x
  2. Step 2: Convert to fraction form
    20,808.35/28,715.56 = 11,377.52/x
  3. Step 3: Cross multiply
    20,808.35x = 28,715.56 × 11,377.52
  4. Step 4: Simplify right side
    20,808.35x = 326,711,714.63
  5. Step 5: Solve for x
    x = 326,711,714.63/20,808.35
  6. Step 6: Final answer
    x = 15,700.99

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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.