Home / 42,910.16-64,281.43-20,388.78

Finding the Fourth Proportional to 42,910.16, 64,281.43 and 20,388.78

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Solution

The fourth proportional to 42,910.16, 64,281.43 and 20,388.78 is: 30,543.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,910.16 : 64,281.43 = 20,388.78 : x
  2. Step 2: Convert to fraction form
    42,910.16/64,281.43 = 20,388.78/x
  3. Step 3: Cross multiply
    42,910.16x = 64,281.43 × 20,388.78
  4. Step 4: Simplify right side
    42,910.16x = 1,310,619,934.36
  5. Step 5: Solve for x
    x = 1,310,619,934.36/42,910.16
  6. Step 6: Final answer
    x = 30,543.35

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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.