Home / 20,595.64-28,419.34-13,422.28

Finding the Fourth Proportional to 20,595.64, 28,419.34 and 13,422.28

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Solution

The fourth proportional to 20,595.64, 28,419.34 and 13,422.28 is: 18,521.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,595.64 : 28,419.34 = 13,422.28 : x
  2. Step 2: Convert to fraction form
    20,595.64/28,419.34 = 13,422.28/x
  3. Step 3: Cross multiply
    20,595.64x = 28,419.34 × 13,422.28
  4. Step 4: Simplify right side
    20,595.64x = 381,452,338.90
  5. Step 5: Solve for x
    x = 381,452,338.90/20,595.64
  6. Step 6: Final answer
    x = 18,521.02

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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.