Home / 28,122.39-42,189.65-8,402.55

Finding the Fourth Proportional to 28,122.39, 42,189.65 and 8,402.55

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Solution

The fourth proportional to 28,122.39, 42,189.65 and 8,402.55 is: 12,605.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,122.39 : 42,189.65 = 8,402.55 : x
  2. Step 2: Convert to fraction form
    28,122.39/42,189.65 = 8,402.55/x
  3. Step 3: Cross multiply
    28,122.39x = 42,189.65 × 8,402.55
  4. Step 4: Simplify right side
    28,122.39x = 354,500,601.59
  5. Step 5: Solve for x
    x = 354,500,601.59/28,122.39
  6. Step 6: Final answer
    x = 12,605.64

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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.