Home / 21,171.90-29,218.50-12,100.11

Finding the Fourth Proportional to 21,171.90, 29,218.50 and 12,100.11

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Solution

The fourth proportional to 21,171.90, 29,218.50 and 12,100.11 is: 16,698.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.90 : 29,218.50 = 12,100.11 : x
  2. Step 2: Convert to fraction form
    21,171.90/29,218.50 = 12,100.11/x
  3. Step 3: Cross multiply
    21,171.90x = 29,218.50 × 12,100.11
  4. Step 4: Simplify right side
    21,171.90x = 353,547,064.04
  5. Step 5: Solve for x
    x = 353,547,064.04/21,171.90
  6. Step 6: Final answer
    x = 16,698.88

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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.