Home / 12,185.71-18,278.47-4,972.84

Finding the Fourth Proportional to 12,185.71, 18,278.47 and 4,972.84

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Solution

The fourth proportional to 12,185.71, 18,278.47 and 4,972.84 is: 7,459.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.71 : 18,278.47 = 4,972.84 : x
  2. Step 2: Convert to fraction form
    12,185.71/18,278.47 = 4,972.84/x
  3. Step 3: Cross multiply
    12,185.71x = 18,278.47 × 4,972.84
  4. Step 4: Simplify right side
    12,185.71x = 90,895,935.82
  5. Step 5: Solve for x
    x = 90,895,935.82/12,185.71
  6. Step 6: Final answer
    x = 7,459.22

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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.