Home / 20,878.15-31,320.68-10,348.66

Finding the Fourth Proportional to 20,878.15, 31,320.68 and 10,348.66

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Solution

The fourth proportional to 20,878.15, 31,320.68 and 10,348.66 is: 15,524.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.15 : 31,320.68 = 10,348.66 : x
  2. Step 2: Convert to fraction form
    20,878.15/31,320.68 = 10,348.66/x
  3. Step 3: Cross multiply
    20,878.15x = 31,320.68 × 10,348.66
  4. Step 4: Simplify right side
    20,878.15x = 324,127,068.29
  5. Step 5: Solve for x
    x = 324,127,068.29/20,878.15
  6. Step 6: Final answer
    x = 15,524.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.