Home / 42,470.36-63,708.54-12,890.60

Finding the Fourth Proportional to 42,470.36, 63,708.54 and 12,890.60

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Solution

The fourth proportional to 42,470.36, 63,708.54 and 12,890.60 is: 19,336.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,470.36 : 63,708.54 = 12,890.60 : x
  2. Step 2: Convert to fraction form
    42,470.36/63,708.54 = 12,890.60/x
  3. Step 3: Cross multiply
    42,470.36x = 63,708.54 × 12,890.60
  4. Step 4: Simplify right side
    42,470.36x = 821,241,305.72
  5. Step 5: Solve for x
    x = 821,241,305.72/42,470.36
  6. Step 6: Final answer
    x = 19,336.81

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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.