Home / 21,230.61-29,297.55-12,278.49

Finding the Fourth Proportional to 21,230.61, 29,297.55 and 12,278.49

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Solution

The fourth proportional to 21,230.61, 29,297.55 and 12,278.49 is: 16,943.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.61 : 29,297.55 = 12,278.49 : x
  2. Step 2: Convert to fraction form
    21,230.61/29,297.55 = 12,278.49/x
  3. Step 3: Cross multiply
    21,230.61x = 29,297.55 × 12,278.49
  4. Step 4: Simplify right side
    21,230.61x = 359,729,674.70
  5. Step 5: Solve for x
    x = 359,729,674.70/21,230.61
  6. Step 6: Final answer
    x = 16,943.92

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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.