Home / 28,241.60-42,354.30-8,515.40

Finding the Fourth Proportional to 28,241.60, 42,354.30 and 8,515.40

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Solution

The fourth proportional to 28,241.60, 42,354.30 and 8,515.40 is: 12,770.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,241.60 : 42,354.30 = 8,515.40 : x
  2. Step 2: Convert to fraction form
    28,241.60/42,354.30 = 8,515.40/x
  3. Step 3: Cross multiply
    28,241.60x = 42,354.30 × 8,515.40
  4. Step 4: Simplify right side
    28,241.60x = 360,663,806.22
  5. Step 5: Solve for x
    x = 360,663,806.22/28,241.60
  6. Step 6: Final answer
    x = 12,770.66

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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.