Home / 28,212.90-42,305.67-8,487.78

Finding the Fourth Proportional to 28,212.90, 42,305.67 and 8,487.78

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Solution

The fourth proportional to 28,212.90, 42,305.67 and 8,487.78 is: 12,727.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,212.90 : 42,305.67 = 8,487.78 : x
  2. Step 2: Convert to fraction form
    28,212.90/42,305.67 = 8,487.78/x
  3. Step 3: Cross multiply
    28,212.90x = 42,305.67 × 8,487.78
  4. Step 4: Simplify right side
    28,212.90x = 359,081,219.71
  5. Step 5: Solve for x
    x = 359,081,219.71/28,212.90
  6. Step 6: Final answer
    x = 12,727.55

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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.