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Finding the Fourth Proportional to 15,935.24, 21,987.06 and 9,647.48

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Solution

The fourth proportional to 15,935.24, 21,987.06 and 9,647.48 is: 13,311.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,935.24 : 21,987.06 = 9,647.48 : x
  2. Step 2: Convert to fraction form
    15,935.24/21,987.06 = 9,647.48/x
  3. Step 3: Cross multiply
    15,935.24x = 21,987.06 × 9,647.48
  4. Step 4: Simplify right side
    15,935.24x = 212,119,721.61
  5. Step 5: Solve for x
    x = 212,119,721.61/15,935.24
  6. Step 6: Final answer
    x = 13,311.36

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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.