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Finding the Fourth Proportional to 42,042.70, 63,063.78 and 12,460.70

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Solution

The fourth proportional to 42,042.70, 63,063.78 and 12,460.70 is: 18,690.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,042.70 : 63,063.78 = 12,460.70 : x
  2. Step 2: Convert to fraction form
    42,042.70/63,063.78 = 12,460.70/x
  3. Step 3: Cross multiply
    42,042.70x = 63,063.78 × 12,460.70
  4. Step 4: Simplify right side
    42,042.70x = 785,818,843.45
  5. Step 5: Solve for x
    x = 785,818,843.45/42,042.70
  6. Step 6: Final answer
    x = 18,690.97

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1.5x scale

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.