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Finding the Fourth Proportional to 15,672, 21,628.32 and 8,599.52

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Solution

The fourth proportional to 15,672, 21,628.32 and 8,599.52 is: 11,867.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,672 : 21,628.32 = 8,599.52 : x
  2. Step 2: Convert to fraction form
    15,672/21,628.32 = 8,599.52/x
  3. Step 3: Cross multiply
    15,672x = 21,628.32 × 8,599.52
  4. Step 4: Simplify right side
    15,672x = 185,993,170.41
  5. Step 5: Solve for x
    x = 185,993,170.41/15,672
  6. Step 6: Final answer
    x = 11,867.86

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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.