Home / 20,876.96-28,810.32-11,316.92

Finding the Fourth Proportional to 20,876.96, 28,810.32 and 11,316.92

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Solution

The fourth proportional to 20,876.96, 28,810.32 and 11,316.92 is: 15,617.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.96 : 28,810.32 = 11,316.92 : x
  2. Step 2: Convert to fraction form
    20,876.96/28,810.32 = 11,316.92/x
  3. Step 3: Cross multiply
    20,876.96x = 28,810.32 × 11,316.92
  4. Step 4: Simplify right side
    20,876.96x = 326,044,086.61
  5. Step 5: Solve for x
    x = 326,044,086.61/20,876.96
  6. Step 6: Final answer
    x = 15,617.41

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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.