Home / 42,711.96-64,109.28-20,540.64

Finding the Fourth Proportional to 42,711.96, 64,109.28 and 20,540.64

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Solution

The fourth proportional to 42,711.96, 64,109.28 and 20,540.64 is: 30,830.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,711.96 : 64,109.28 = 20,540.64 : x
  2. Step 2: Convert to fraction form
    42,711.96/64,109.28 = 20,540.64/x
  3. Step 3: Cross multiply
    42,711.96x = 64,109.28 × 20,540.64
  4. Step 4: Simplify right side
    42,711.96x = 1,316,845,641.14
  5. Step 5: Solve for x
    x = 1,316,845,641.14/42,711.96
  6. Step 6: Final answer
    x = 30,830.84

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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.