Home / 20,655.76-28,506.11-11,706.15

Finding the Fourth Proportional to 20,655.76, 28,506.11 and 11,706.15

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Solution

The fourth proportional to 20,655.76, 28,506.11 and 11,706.15 is: 16,155.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.76 : 28,506.11 = 11,706.15 : x
  2. Step 2: Convert to fraction form
    20,655.76/28,506.11 = 11,706.15/x
  3. Step 3: Cross multiply
    20,655.76x = 28,506.11 × 11,706.15
  4. Step 4: Simplify right side
    20,655.76x = 333,696,799.58
  5. Step 5: Solve for x
    x = 333,696,799.58/20,655.76
  6. Step 6: Final answer
    x = 16,155.15

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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.