Home / 20,330.10-28,054.53-11,377.62

Finding the Fourth Proportional to 20,330.10, 28,054.53 and 11,377.62

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Solution

The fourth proportional to 20,330.10, 28,054.53 and 11,377.62 is: 15,700.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.10 : 28,054.53 = 11,377.62 : x
  2. Step 2: Convert to fraction form
    20,330.10/28,054.53 = 11,377.62/x
  3. Step 3: Cross multiply
    20,330.10x = 28,054.53 × 11,377.62
  4. Step 4: Simplify right side
    20,330.10x = 319,193,781.62
  5. Step 5: Solve for x
    x = 319,193,781.62/20,330.10
  6. Step 6: Final answer
    x = 15,700.55

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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.