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Finding the Fourth Proportional to 18,607.31, 25,663.95 and 12,874.31

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Solution

The fourth proportional to 18,607.31, 25,663.95 and 12,874.31 is: 17,756.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,607.31 : 25,663.95 = 12,874.31 : x
  2. Step 2: Convert to fraction form
    18,607.31/25,663.95 = 12,874.31/x
  3. Step 3: Cross multiply
    18,607.31x = 25,663.95 × 12,874.31
  4. Step 4: Simplify right side
    18,607.31x = 330,405,648.12
  5. Step 5: Solve for x
    x = 330,405,648.12/18,607.31
  6. Step 6: Final answer
    x = 17,756.77

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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.