Home / 52,539.20-78,740.40-21,338

Finding the Fourth Proportional to 52,539.20, 78,740.40 and 21,338

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Solution

The fourth proportional to 52,539.20, 78,740.40 and 21,338 is: 31,979.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,539.20 : 78,740.40 = 21,338 : x
  2. Step 2: Convert to fraction form
    52,539.20/78,740.40 = 21,338/x
  3. Step 3: Cross multiply
    52,539.20x = 78,740.40 × 21,338
  4. Step 4: Simplify right side
    52,539.20x = 1,680,162,655.20
  5. Step 5: Solve for x
    x = 1,680,162,655.20/52,539.20
  6. Step 6: Final answer
    x = 31,979.22

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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.