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Finding the Fourth Proportional to 15,204.51, 20,983.05 and 8,916.89

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Solution

The fourth proportional to 15,204.51, 20,983.05 and 8,916.89 is: 12,305.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,204.51 : 20,983.05 = 8,916.89 : x
  2. Step 2: Convert to fraction form
    15,204.51/20,983.05 = 8,916.89/x
  3. Step 3: Cross multiply
    15,204.51x = 20,983.05 × 8,916.89
  4. Step 4: Simplify right side
    15,204.51x = 187,103,443.80
  5. Step 5: Solve for x
    x = 187,103,443.80/15,204.51
  6. Step 6: Final answer
    x = 12,305.79

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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.