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Finding the Fourth Proportional to 15,038.64, 20,754.89 and 8,665.49

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Solution

The fourth proportional to 15,038.64, 20,754.89 and 8,665.49 is: 11,959.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,038.64 : 20,754.89 = 8,665.49 : x
  2. Step 2: Convert to fraction form
    15,038.64/20,754.89 = 8,665.49/x
  3. Step 3: Cross multiply
    15,038.64x = 20,754.89 × 8,665.49
  4. Step 4: Simplify right side
    15,038.64x = 179,851,144.64
  5. Step 5: Solve for x
    x = 179,851,144.64/15,038.64
  6. Step 6: Final answer
    x = 11,959.27

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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.