Home / 20,378.16-28,124.28-13,325.04

Finding the Fourth Proportional to 20,378.16, 28,124.28 and 13,325.04

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Solution

The fourth proportional to 20,378.16, 28,124.28 and 13,325.04 is: 18,390.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.16 : 28,124.28 = 13,325.04 : x
  2. Step 2: Convert to fraction form
    20,378.16/28,124.28 = 13,325.04/x
  3. Step 3: Cross multiply
    20,378.16x = 28,124.28 × 13,325.04
  4. Step 4: Simplify right side
    20,378.16x = 374,757,155.97
  5. Step 5: Solve for x
    x = 374,757,155.97/20,378.16
  6. Step 6: Final answer
    x = 18,390.14

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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.