Home / 20,439.18-28,206.32-11,486.16

Finding the Fourth Proportional to 20,439.18, 28,206.32 and 11,486.16

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Solution

The fourth proportional to 20,439.18, 28,206.32 and 11,486.16 is: 15,851.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.18 : 28,206.32 = 11,486.16 : x
  2. Step 2: Convert to fraction form
    20,439.18/28,206.32 = 11,486.16/x
  3. Step 3: Cross multiply
    20,439.18x = 28,206.32 × 11,486.16
  4. Step 4: Simplify right side
    20,439.18x = 323,982,247.10
  5. Step 5: Solve for x
    x = 323,982,247.10/20,439.18
  6. Step 6: Final answer
    x = 15,851.04

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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.