Home / 21,857.04-30,155.22-12,423.24

Finding the Fourth Proportional to 21,857.04, 30,155.22 and 12,423.24

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Solution

The fourth proportional to 21,857.04, 30,155.22 and 12,423.24 is: 17,139.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,857.04 : 30,155.22 = 12,423.24 : x
  2. Step 2: Convert to fraction form
    21,857.04/30,155.22 = 12,423.24/x
  3. Step 3: Cross multiply
    21,857.04x = 30,155.22 × 12,423.24
  4. Step 4: Simplify right side
    21,857.04x = 374,625,535.31
  5. Step 5: Solve for x
    x = 374,625,535.31/21,857.04
  6. Step 6: Final answer
    x = 17,139.81

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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.