Home / 21,114.08-29,135.76-13,165.28

Finding the Fourth Proportional to 21,114.08, 29,135.76 and 13,165.28

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Solution

The fourth proportional to 21,114.08, 29,135.76 and 13,165.28 is: 18,167.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.08 : 29,135.76 = 13,165.28 : x
  2. Step 2: Convert to fraction form
    21,114.08/29,135.76 = 13,165.28/x
  3. Step 3: Cross multiply
    21,114.08x = 29,135.76 × 13,165.28
  4. Step 4: Simplify right side
    21,114.08x = 383,580,438.41
  5. Step 5: Solve for x
    x = 383,580,438.41/21,114.08
  6. Step 6: Final answer
    x = 18,167.04

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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.