Home / 20,530.19-28,331.57-11,098.76

Finding the Fourth Proportional to 20,530.19, 28,331.57 and 11,098.76

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Solution

The fourth proportional to 20,530.19, 28,331.57 and 11,098.76 is: 15,316.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.19 : 28,331.57 = 11,098.76 : x
  2. Step 2: Convert to fraction form
    20,530.19/28,331.57 = 11,098.76/x
  3. Step 3: Cross multiply
    20,530.19x = 28,331.57 × 11,098.76
  4. Step 4: Simplify right side
    20,530.19x = 314,445,181.94
  5. Step 5: Solve for x
    x = 314,445,181.94/20,530.19
  6. Step 6: Final answer
    x = 15,316.23

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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.