Home / 20,928.24-28,871.10-13,370.64

Finding the Fourth Proportional to 20,928.24, 28,871.10 and 13,370.64

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Solution

The fourth proportional to 20,928.24, 28,871.10 and 13,370.64 is: 18,445.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.24 : 28,871.10 = 13,370.64 : x
  2. Step 2: Convert to fraction form
    20,928.24/28,871.10 = 13,370.64/x
  3. Step 3: Cross multiply
    20,928.24x = 28,871.10 × 13,370.64
  4. Step 4: Simplify right side
    20,928.24x = 386,025,084.50
  5. Step 5: Solve for x
    x = 386,025,084.50/20,928.24
  6. Step 6: Final answer
    x = 18,445.18

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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.