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Finding the Fourth Proportional to 42,603.50, 63,905.42 and 13,021.22

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Solution

The fourth proportional to 42,603.50, 63,905.42 and 13,021.22 is: 19,531.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,603.50 : 63,905.42 = 13,021.22 : x
  2. Step 2: Convert to fraction form
    42,603.50/63,905.42 = 13,021.22/x
  3. Step 3: Cross multiply
    42,603.50x = 63,905.42 × 13,021.22
  4. Step 4: Simplify right side
    42,603.50x = 832,126,725.33
  5. Step 5: Solve for x
    x = 832,126,725.33/42,603.50
  6. Step 6: Final answer
    x = 19,531.89

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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.