Home / 12,117.84-18,181.92-6,278.56

Finding the Fourth Proportional to 12,117.84, 18,181.92 and 6,278.56

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Solution

The fourth proportional to 12,117.84, 18,181.92 and 6,278.56 is: 9,420.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,117.84 : 18,181.92 = 6,278.56 : x
  2. Step 2: Convert to fraction form
    12,117.84/18,181.92 = 6,278.56/x
  3. Step 3: Cross multiply
    12,117.84x = 18,181.92 × 6,278.56
  4. Step 4: Simplify right side
    12,117.84x = 114,156,275.64
  5. Step 5: Solve for x
    x = 114,156,275.64/12,117.84
  6. Step 6: Final answer
    x = 9,420.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.