Home / 42,960.80-64,438.48-13,376.40

Finding the Fourth Proportional to 42,960.80, 64,438.48 and 13,376.40

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Solution

The fourth proportional to 42,960.80, 64,438.48 and 13,376.40 is: 20,063.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,960.80 : 64,438.48 = 13,376.40 : x
  2. Step 2: Convert to fraction form
    42,960.80/64,438.48 = 13,376.40/x
  3. Step 3: Cross multiply
    42,960.80x = 64,438.48 × 13,376.40
  4. Step 4: Simplify right side
    42,960.80x = 861,954,883.87
  5. Step 5: Solve for x
    x = 861,954,883.87/42,960.80
  6. Step 6: Final answer
    x = 20,063.75

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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.