Home / 42,883.30-64,346.90-20,419.38

Finding the Fourth Proportional to 42,883.30, 64,346.90 and 20,419.38

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Solution

The fourth proportional to 42,883.30, 64,346.90 and 20,419.38 is: 30,639.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,883.30 : 64,346.90 = 20,419.38 : x
  2. Step 2: Convert to fraction form
    42,883.30/64,346.90 = 20,419.38/x
  3. Step 3: Cross multiply
    42,883.30x = 64,346.90 × 20,419.38
  4. Step 4: Simplify right side
    42,883.30x = 1,313,923,802.92
  5. Step 5: Solve for x
    x = 1,313,923,802.92/42,883.30
  6. Step 6: Final answer
    x = 30,639.52

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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.