Home / 21,172.26-29,217.24-12,219.51

Finding the Fourth Proportional to 21,172.26, 29,217.24 and 12,219.51

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Solution

The fourth proportional to 21,172.26, 29,217.24 and 12,219.51 is: 16,862.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.26 : 29,217.24 = 12,219.51 : x
  2. Step 2: Convert to fraction form
    21,172.26/29,217.24 = 12,219.51/x
  3. Step 3: Cross multiply
    21,172.26x = 29,217.24 × 12,219.51
  4. Step 4: Simplify right side
    21,172.26x = 357,020,356.35
  5. Step 5: Solve for x
    x = 357,020,356.35/21,172.26
  6. Step 6: Final answer
    x = 16,862.65

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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.