Home / 42,748.20-64,122.12-13,158

Finding the Fourth Proportional to 42,748.20, 64,122.12 and 13,158

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Solution

The fourth proportional to 42,748.20, 64,122.12 and 13,158 is: 19,736.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,748.20 : 64,122.12 = 13,158 : x
  2. Step 2: Convert to fraction form
    42,748.20/64,122.12 = 13,158/x
  3. Step 3: Cross multiply
    42,748.20x = 64,122.12 × 13,158
  4. Step 4: Simplify right side
    42,748.20x = 843,718,854.96
  5. Step 5: Solve for x
    x = 843,718,854.96/42,748.20
  6. Step 6: Final answer
    x = 19,736.94

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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.