Home / 20,928.80-31,344.60-14,319.20

Finding the Fourth Proportional to 20,928.80, 31,344.60 and 14,319.20

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Solution

The fourth proportional to 20,928.80, 31,344.60 and 14,319.20 is: 21,445.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.80 : 31,344.60 = 14,319.20 : x
  2. Step 2: Convert to fraction form
    20,928.80/31,344.60 = 14,319.20/x
  3. Step 3: Cross multiply
    20,928.80x = 31,344.60 × 14,319.20
  4. Step 4: Simplify right side
    20,928.80x = 448,829,596.32
  5. Step 5: Solve for x
    x = 448,829,596.32/20,928.80
  6. Step 6: Final answer
    x = 21,445.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.