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Finding the Fourth Proportional to 15,673.30, 21,629.18 and 8,599.78

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Solution

The fourth proportional to 15,673.30, 21,629.18 and 8,599.78 is: 11,867.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,673.30 : 21,629.18 = 8,599.78 : x
  2. Step 2: Convert to fraction form
    15,673.30/21,629.18 = 8,599.78/x
  3. Step 3: Cross multiply
    15,673.30x = 21,629.18 × 8,599.78
  4. Step 4: Simplify right side
    15,673.30x = 186,006,081.43
  5. Step 5: Solve for x
    x = 186,006,081.43/15,673.30
  6. Step 6: Final answer
    x = 11,867.70

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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.