Home / 20,865.60-31,124.16-18,895.68

Finding the Fourth Proportional to 20,865.60, 31,124.16 and 18,895.68

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Solution

The fourth proportional to 20,865.60, 31,124.16 and 18,895.68 is: 28,185.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.60 : 31,124.16 = 18,895.68 : x
  2. Step 2: Convert to fraction form
    20,865.60/31,124.16 = 18,895.68/x
  3. Step 3: Cross multiply
    20,865.60x = 31,124.16 × 18,895.68
  4. Step 4: Simplify right side
    20,865.60x = 588,112,167.63
  5. Step 5: Solve for x
    x = 588,112,167.63/20,865.60
  6. Step 6: Final answer
    x = 28,185.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.