Home / 28,147.60-42,218.96-8,430.58

Finding the Fourth Proportional to 28,147.60, 42,218.96 and 8,430.58

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Solution

The fourth proportional to 28,147.60, 42,218.96 and 8,430.58 is: 12,645.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,147.60 : 42,218.96 = 8,430.58 : x
  2. Step 2: Convert to fraction form
    28,147.60/42,218.96 = 8,430.58/x
  3. Step 3: Cross multiply
    28,147.60x = 42,218.96 × 8,430.58
  4. Step 4: Simplify right side
    28,147.60x = 355,930,108.70
  5. Step 5: Solve for x
    x = 355,930,108.70/28,147.60
  6. Step 6: Final answer
    x = 12,645.13

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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.