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Finding the Fourth Proportional to 42,603.70, 63,905.55 and 11,013.70

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Solution

The fourth proportional to 42,603.70, 63,905.55 and 11,013.70 is: 16,520.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,603.70 : 63,905.55 = 11,013.70 : x
  2. Step 2: Convert to fraction form
    42,603.70/63,905.55 = 11,013.70/x
  3. Step 3: Cross multiply
    42,603.70x = 63,905.55 × 11,013.70
  4. Step 4: Simplify right side
    42,603.70x = 703,836,556.04
  5. Step 5: Solve for x
    x = 703,836,556.04/42,603.70
  6. Step 6: Final answer
    x = 16,520.55

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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.