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Finding the Fourth Proportional to 42,016.40, 63,053.40 and 18,659.60

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Solution

The fourth proportional to 42,016.40, 63,053.40 and 18,659.60 is: 28,002.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,016.40 : 63,053.40 = 18,659.60 : x
  2. Step 2: Convert to fraction form
    42,016.40/63,053.40 = 18,659.60/x
  3. Step 3: Cross multiply
    42,016.40x = 63,053.40 × 18,659.60
  4. Step 4: Simplify right side
    42,016.40x = 1,176,551,222.64
  5. Step 5: Solve for x
    x = 1,176,551,222.64/42,016.40
  6. Step 6: Final answer
    x = 28,002.19

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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.