Home / 30,972.54-42,748.91-20,363.16

Finding the Fourth Proportional to 30,972.54, 42,748.91 and 20,363.16

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Solution

The fourth proportional to 30,972.54, 42,748.91 and 20,363.16 is: 28,105.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,972.54 : 42,748.91 = 20,363.16 : x
  2. Step 2: Convert to fraction form
    30,972.54/42,748.91 = 20,363.16/x
  3. Step 3: Cross multiply
    30,972.54x = 42,748.91 × 20,363.16
  4. Step 4: Simplify right side
    30,972.54x = 870,503,143.55
  5. Step 5: Solve for x
    x = 870,503,143.55/30,972.54
  6. Step 6: Final answer
    x = 28,105.64

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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.