Home / 57,715.20-86,572.80-20,281.05

Finding the Fourth Proportional to 57,715.20, 86,572.80 and 20,281.05

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Solution

The fourth proportional to 57,715.20, 86,572.80 and 20,281.05 is: 30,421.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,715.20 : 86,572.80 = 20,281.05 : x
  2. Step 2: Convert to fraction form
    57,715.20/86,572.80 = 20,281.05/x
  3. Step 3: Cross multiply
    57,715.20x = 86,572.80 × 20,281.05
  4. Step 4: Simplify right side
    57,715.20x = 1,755,787,285.44
  5. Step 5: Solve for x
    x = 1,755,787,285.44/57,715.20
  6. Step 6: Final answer
    x = 30,421.58

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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.