Home / 28,381.86-42,479.91-20,883.42

Finding the Fourth Proportional to 28,381.86, 42,479.91 and 20,883.42

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Solution

The fourth proportional to 28,381.86, 42,479.91 and 20,883.42 is: 31,256.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.86 : 42,479.91 = 20,883.42 : x
  2. Step 2: Convert to fraction form
    28,381.86/42,479.91 = 20,883.42/x
  3. Step 3: Cross multiply
    28,381.86x = 42,479.91 × 20,883.42
  4. Step 4: Simplify right side
    28,381.86x = 887,125,802.09
  5. Step 5: Solve for x
    x = 887,125,802.09/28,381.86
  6. Step 6: Final answer
    x = 31,256.79

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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.