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Finding the Fourth Proportional to 15,652, 21,601.68 and 9,028

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Solution

The fourth proportional to 15,652, 21,601.68 and 9,028 is: 12,459.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,652 : 21,601.68 = 9,028 : x
  2. Step 2: Convert to fraction form
    15,652/21,601.68 = 9,028/x
  3. Step 3: Cross multiply
    15,652x = 21,601.68 × 9,028
  4. Step 4: Simplify right side
    15,652x = 195,019,967.04
  5. Step 5: Solve for x
    x = 195,019,967.04/15,652
  6. Step 6: Final answer
    x = 12,459.75

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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.