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Finding the Fourth Proportional to 18,670.61, 25,765.17 and 10,712.66

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Solution

The fourth proportional to 18,670.61, 25,765.17 and 10,712.66 is: 14,783.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,670.61 : 25,765.17 = 10,712.66 : x
  2. Step 2: Convert to fraction form
    18,670.61/25,765.17 = 10,712.66/x
  3. Step 3: Cross multiply
    18,670.61x = 25,765.17 × 10,712.66
  4. Step 4: Simplify right side
    18,670.61x = 276,013,506.05
  5. Step 5: Solve for x
    x = 276,013,506.05/18,670.61
  6. Step 6: Final answer
    x = 14,783.31

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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.