Home / 12,185.49-18,278.20-9,971.16

Finding the Fourth Proportional to 12,185.49, 18,278.20 and 9,971.16

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Solution

The fourth proportional to 12,185.49, 18,278.20 and 9,971.16 is: 14,956.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.49 : 18,278.20 = 9,971.16 : x
  2. Step 2: Convert to fraction form
    12,185.49/18,278.20 = 9,971.16/x
  3. Step 3: Cross multiply
    12,185.49x = 18,278.20 × 9,971.16
  4. Step 4: Simplify right side
    12,185.49x = 182,254,856.71
  5. Step 5: Solve for x
    x = 182,254,856.71/12,185.49
  6. Step 6: Final answer
    x = 14,956.71

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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.