Home / 20,445.28-28,205.01-11,947.75

Finding the Fourth Proportional to 20,445.28, 28,205.01 and 11,947.75

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Solution

The fourth proportional to 20,445.28, 28,205.01 and 11,947.75 is: 16,482.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.28 : 28,205.01 = 11,947.75 : x
  2. Step 2: Convert to fraction form
    20,445.28/28,205.01 = 11,947.75/x
  3. Step 3: Cross multiply
    20,445.28x = 28,205.01 × 11,947.75
  4. Step 4: Simplify right side
    20,445.28x = 336,986,408.23
  5. Step 5: Solve for x
    x = 336,986,408.23/20,445.28
  6. Step 6: Final answer
    x = 16,482.36

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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.