Home / 31,642.85-47,454.86-11,916.72

Finding the Fourth Proportional to 31,642.85, 47,454.86 and 11,916.72

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Solution

The fourth proportional to 31,642.85, 47,454.86 and 11,916.72 is: 17,871.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,642.85 : 47,454.86 = 11,916.72 : x
  2. Step 2: Convert to fraction form
    31,642.85/47,454.86 = 11,916.72/x
  3. Step 3: Cross multiply
    31,642.85x = 47,454.86 × 11,916.72
  4. Step 4: Simplify right side
    31,642.85x = 565,506,309.05
  5. Step 5: Solve for x
    x = 565,506,309.05/31,642.85
  6. Step 6: Final answer
    x = 17,871.53

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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.