Home / 28,478.40-42,722.04-13,684.56

Finding the Fourth Proportional to 28,478.40, 42,722.04 and 13,684.56

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Solution

The fourth proportional to 28,478.40, 42,722.04 and 13,684.56 is: 20,528.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.40 : 42,722.04 = 13,684.56 : x
  2. Step 2: Convert to fraction form
    28,478.40/42,722.04 = 13,684.56/x
  3. Step 3: Cross multiply
    28,478.40x = 42,722.04 × 13,684.56
  4. Step 4: Simplify right side
    28,478.40x = 584,632,319.70
  5. Step 5: Solve for x
    x = 584,632,319.70/28,478.40
  6. Step 6: Final answer
    x = 20,528.97

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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.