Home / 42,678.25-63,985.68-20,470.48

Finding the Fourth Proportional to 42,678.25, 63,985.68 and 20,470.48

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Solution

The fourth proportional to 42,678.25, 63,985.68 and 20,470.48 is: 30,690.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,678.25 : 63,985.68 = 20,470.48 : x
  2. Step 2: Convert to fraction form
    42,678.25/63,985.68 = 20,470.48/x
  3. Step 3: Cross multiply
    42,678.25x = 63,985.68 × 20,470.48
  4. Step 4: Simplify right side
    42,678.25x = 1,309,817,422.76
  5. Step 5: Solve for x
    x = 1,309,817,422.76/42,678.25
  6. Step 6: Final answer
    x = 30,690.52

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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.