Home / 20,912.73-31,341.40-15,339.98

Finding the Fourth Proportional to 20,912.73, 31,341.40 and 15,339.98

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Solution

The fourth proportional to 20,912.73, 31,341.40 and 15,339.98 is: 22,989.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.73 : 31,341.40 = 15,339.98 : x
  2. Step 2: Convert to fraction form
    20,912.73/31,341.40 = 15,339.98/x
  3. Step 3: Cross multiply
    20,912.73x = 31,341.40 × 15,339.98
  4. Step 4: Simplify right side
    20,912.73x = 480,776,292.47
  5. Step 5: Solve for x
    x = 480,776,292.47/20,912.73
  6. Step 6: Final answer
    x = 22,989.65

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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.