Home / 21,230.17-29,297.91-12,278.05

Finding the Fourth Proportional to 21,230.17, 29,297.91 and 12,278.05

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Solution

The fourth proportional to 21,230.17, 29,297.91 and 12,278.05 is: 16,943.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.17 : 29,297.91 = 12,278.05 : x
  2. Step 2: Convert to fraction form
    21,230.17/29,297.91 = 12,278.05/x
  3. Step 3: Cross multiply
    21,230.17x = 29,297.91 × 12,278.05
  4. Step 4: Simplify right side
    21,230.17x = 359,721,203.88
  5. Step 5: Solve for x
    x = 359,721,203.88/21,230.17
  6. Step 6: Final answer
    x = 16,943.87

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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.