Home / 21,089.10-29,103.48-12,139.38

Finding the Fourth Proportional to 21,089.10, 29,103.48 and 12,139.38

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Solution

The fourth proportional to 21,089.10, 29,103.48 and 12,139.38 is: 16,752.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.10 : 29,103.48 = 12,139.38 : x
  2. Step 2: Convert to fraction form
    21,089.10/29,103.48 = 12,139.38/x
  3. Step 3: Cross multiply
    21,089.10x = 29,103.48 × 12,139.38
  4. Step 4: Simplify right side
    21,089.10x = 353,298,203.04
  5. Step 5: Solve for x
    x = 353,298,203.04/21,089.10
  6. Step 6: Final answer
    x = 16,752.64

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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.