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Finding the Fourth Proportional to 15,745.52, 21,721.98 and 9,454.28

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Solution

The fourth proportional to 15,745.52, 21,721.98 and 9,454.28 is: 13,042.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.52 : 21,721.98 = 9,454.28 : x
  2. Step 2: Convert to fraction form
    15,745.52/21,721.98 = 9,454.28/x
  3. Step 3: Cross multiply
    15,745.52x = 21,721.98 × 9,454.28
  4. Step 4: Simplify right side
    15,745.52x = 205,365,681.07
  5. Step 5: Solve for x
    x = 205,365,681.07/15,745.52
  6. Step 6: Final answer
    x = 13,042.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.