Home / 20,948.40-31,385.70-11,065.92

Finding the Fourth Proportional to 20,948.40, 31,385.70 and 11,065.92

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Solution

The fourth proportional to 20,948.40, 31,385.70 and 11,065.92 is: 16,579.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.40 : 31,385.70 = 11,065.92 : x
  2. Step 2: Convert to fraction form
    20,948.40/31,385.70 = 11,065.92/x
  3. Step 3: Cross multiply
    20,948.40x = 31,385.70 × 11,065.92
  4. Step 4: Simplify right side
    20,948.40x = 347,311,645.34
  5. Step 5: Solve for x
    x = 347,311,645.34/20,948.40
  6. Step 6: Final answer
    x = 16,579.39

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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.