Home / 28,298.60-42,399.30-18,432.80

Finding the Fourth Proportional to 28,298.60, 42,399.30 and 18,432.80

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Solution

The fourth proportional to 28,298.60, 42,399.30 and 18,432.80 is: 27,617.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,298.60 : 42,399.30 = 18,432.80 : x
  2. Step 2: Convert to fraction form
    28,298.60/42,399.30 = 18,432.80/x
  3. Step 3: Cross multiply
    28,298.60x = 42,399.30 × 18,432.80
  4. Step 4: Simplify right side
    28,298.60x = 781,537,817.04
  5. Step 5: Solve for x
    x = 781,537,817.04/28,298.60
  6. Step 6: Final answer
    x = 27,617.54

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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.