Home / 21,312.57-29,411.32-11,752.62

Finding the Fourth Proportional to 21,312.57, 29,411.32 and 11,752.62

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Solution

The fourth proportional to 21,312.57, 29,411.32 and 11,752.62 is: 16,218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.57 : 29,411.32 = 11,752.62 : x
  2. Step 2: Convert to fraction form
    21,312.57/29,411.32 = 11,752.62/x
  3. Step 3: Cross multiply
    21,312.57x = 29,411.32 × 11,752.62
  4. Step 4: Simplify right side
    21,312.57x = 345,660,067.66
  5. Step 5: Solve for x
    x = 345,660,067.66/21,312.57
  6. Step 6: Final answer
    x = 16,218.60

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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.