Home / 21,203.08-29,265.57-12,255.78

Finding the Fourth Proportional to 21,203.08, 29,265.57 and 12,255.78

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Solution

The fourth proportional to 21,203.08, 29,265.57 and 12,255.78 is: 16,916.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.08 : 29,265.57 = 12,255.78 : x
  2. Step 2: Convert to fraction form
    21,203.08/29,265.57 = 12,255.78/x
  3. Step 3: Cross multiply
    21,203.08x = 29,265.57 × 12,255.78
  4. Step 4: Simplify right side
    21,203.08x = 358,672,387.49
  5. Step 5: Solve for x
    x = 358,672,387.49/21,203.08
  6. Step 6: Final answer
    x = 16,916.05

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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.