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Finding the Fourth Proportional to 42,444, 63,666 and 13,260

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Solution

The fourth proportional to 42,444, 63,666 and 13,260 is: 19,890

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,444 : 63,666 = 13,260 : x
  2. Step 2: Convert to fraction form
    42,444/63,666 = 13,260/x
  3. Step 3: Cross multiply
    42,444x = 63,666 × 13,260
  4. Step 4: Simplify right side
    42,444x = 844,211,160
  5. Step 5: Solve for x
    x = 844,211,160/42,444
  6. Step 6: Final answer
    x = 19,890

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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.