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Finding the Fourth Proportional to 38,307.66, 57,342.69 and 20,733.90

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Solution

The fourth proportional to 38,307.66, 57,342.69 and 20,733.90 is: 31,036.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,307.66 : 57,342.69 = 20,733.90 : x
  2. Step 2: Convert to fraction form
    38,307.66/57,342.69 = 20,733.90/x
  3. Step 3: Cross multiply
    38,307.66x = 57,342.69 × 20,733.90
  4. Step 4: Simplify right side
    38,307.66x = 1,188,937,600.19
  5. Step 5: Solve for x
    x = 1,188,937,600.19/38,307.66
  6. Step 6: Final answer
    x = 31,036.55

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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.