Home / 20,841.31-28,762.65-11,886.76

Finding the Fourth Proportional to 20,841.31, 28,762.65 and 11,886.76

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Solution

The fourth proportional to 20,841.31, 28,762.65 and 11,886.76 is: 16,404.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,841.31 : 28,762.65 = 11,886.76 : x
  2. Step 2: Convert to fraction form
    20,841.31/28,762.65 = 11,886.76/x
  3. Step 3: Cross multiply
    20,841.31x = 28,762.65 × 11,886.76
  4. Step 4: Simplify right side
    20,841.31x = 341,894,645.61
  5. Step 5: Solve for x
    x = 341,894,645.61/20,841.31
  6. Step 6: Final answer
    x = 16,404.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.