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Finding the Fourth Proportional to 27,219.70, 40,829.55 and 18,909.10

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Solution

The fourth proportional to 27,219.70, 40,829.55 and 18,909.10 is: 28,363.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,219.70 : 40,829.55 = 18,909.10 : x
  2. Step 2: Convert to fraction form
    27,219.70/40,829.55 = 18,909.10/x
  3. Step 3: Cross multiply
    27,219.70x = 40,829.55 × 18,909.10
  4. Step 4: Simplify right side
    27,219.70x = 772,050,043.91
  5. Step 5: Solve for x
    x = 772,050,043.91/27,219.70
  6. Step 6: Final answer
    x = 28,363.65

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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.