Home / 28,531.39-42,838.62-20,255.35

Finding the Fourth Proportional to 28,531.39, 42,838.62 and 20,255.35

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Solution

The fourth proportional to 28,531.39, 42,838.62 and 20,255.35 is: 30,412.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.39 : 42,838.62 = 20,255.35 : x
  2. Step 2: Convert to fraction form
    28,531.39/42,838.62 = 20,255.35/x
  3. Step 3: Cross multiply
    28,531.39x = 42,838.62 × 20,255.35
  4. Step 4: Simplify right side
    28,531.39x = 867,711,027.42
  5. Step 5: Solve for x
    x = 867,711,027.42/28,531.39
  6. Step 6: Final answer
    x = 30,412.51

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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.