Home / 57,986.20-86,979.30-28,461.70

Finding the Fourth Proportional to 57,986.20, 86,979.30 and 28,461.70

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Solution

The fourth proportional to 57,986.20, 86,979.30 and 28,461.70 is: 42,692.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,986.20 : 86,979.30 = 28,461.70 : x
  2. Step 2: Convert to fraction form
    57,986.20/86,979.30 = 28,461.70/x
  3. Step 3: Cross multiply
    57,986.20x = 86,979.30 × 28,461.70
  4. Step 4: Simplify right side
    57,986.20x = 2,475,578,742.81
  5. Step 5: Solve for x
    x = 2,475,578,742.81/57,986.20
  6. Step 6: Final answer
    x = 42,692.55

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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.