Home / 21,213.86-29,278.92-12,260.12

Finding the Fourth Proportional to 21,213.86, 29,278.92 and 12,260.12

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Solution

The fourth proportional to 21,213.86, 29,278.92 and 12,260.12 is: 16,921.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.86 : 29,278.92 = 12,260.12 : x
  2. Step 2: Convert to fraction form
    21,213.86/29,278.92 = 12,260.12/x
  3. Step 3: Cross multiply
    21,213.86x = 29,278.92 × 12,260.12
  4. Step 4: Simplify right side
    21,213.86x = 358,963,072.67
  5. Step 5: Solve for x
    x = 358,963,072.67/21,213.86
  6. Step 6: Final answer
    x = 16,921.16

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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.