Home / 20,810.60-31,166.58-11,930.76

Finding the Fourth Proportional to 20,810.60, 31,166.58 and 11,930.76

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Solution

The fourth proportional to 20,810.60, 31,166.58 and 11,930.76 is: 17,867.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.60 : 31,166.58 = 11,930.76 : x
  2. Step 2: Convert to fraction form
    20,810.60/31,166.58 = 11,930.76/x
  3. Step 3: Cross multiply
    20,810.60x = 31,166.58 × 11,930.76
  4. Step 4: Simplify right side
    20,810.60x = 371,840,830.17
  5. Step 5: Solve for x
    x = 371,840,830.17/20,810.60
  6. Step 6: Final answer
    x = 17,867.86

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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.