Home / 31,920.90-47,764.71-18,779.46

Finding the Fourth Proportional to 31,920.90, 47,764.71 and 18,779.46

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Solution

The fourth proportional to 31,920.90, 47,764.71 and 18,779.46 is: 28,100.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,920.90 : 47,764.71 = 18,779.46 : x
  2. Step 2: Convert to fraction form
    31,920.90/47,764.71 = 18,779.46/x
  3. Step 3: Cross multiply
    31,920.90x = 47,764.71 × 18,779.46
  4. Step 4: Simplify right side
    31,920.90x = 896,995,366.96
  5. Step 5: Solve for x
    x = 896,995,366.96/31,920.90
  6. Step 6: Final answer
    x = 28,100.57

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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.