Home / 28,680.48-39,557.16-20,748.96

Finding the Fourth Proportional to 28,680.48, 39,557.16 and 20,748.96

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Solution

The fourth proportional to 28,680.48, 39,557.16 and 20,748.96 is: 28,617.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,680.48 : 39,557.16 = 20,748.96 : x
  2. Step 2: Convert to fraction form
    28,680.48/39,557.16 = 20,748.96/x
  3. Step 3: Cross multiply
    28,680.48x = 39,557.16 × 20,748.96
  4. Step 4: Simplify right side
    28,680.48x = 820,769,930.55
  5. Step 5: Solve for x
    x = 820,769,930.55/28,680.48
  6. Step 6: Final answer
    x = 28,617.72

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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.