Home / 13,920.31-20,877.27-8,299.57

Finding the Fourth Proportional to 13,920.31, 20,877.27 and 8,299.57

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Solution

The fourth proportional to 13,920.31, 20,877.27 and 8,299.57 is: 12,447.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.31 : 20,877.27 = 8,299.57 : x
  2. Step 2: Convert to fraction form
    13,920.31/20,877.27 = 8,299.57/x
  3. Step 3: Cross multiply
    13,920.31x = 20,877.27 × 8,299.57
  4. Step 4: Simplify right side
    13,920.31x = 173,272,363.77
  5. Step 5: Solve for x
    x = 173,272,363.77/13,920.31
  6. Step 6: Final answer
    x = 12,447.45

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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.