Home / 38,515.20-53,145.60-21,518.72

Finding the Fourth Proportional to 38,515.20, 53,145.60 and 21,518.72

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Solution

The fourth proportional to 38,515.20, 53,145.60 and 21,518.72 is: 29,692.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,515.20 : 53,145.60 = 21,518.72 : x
  2. Step 2: Convert to fraction form
    38,515.20/53,145.60 = 21,518.72/x
  3. Step 3: Cross multiply
    38,515.20x = 53,145.60 × 21,518.72
  4. Step 4: Simplify right side
    38,515.20x = 1,143,625,285.63
  5. Step 5: Solve for x
    x = 1,143,625,285.63/38,515.20
  6. Step 6: Final answer
    x = 29,692.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.