Home / 20,723.40-31,085.10-18,131.40

Finding the Fourth Proportional to 20,723.40, 31,085.10 and 18,131.40

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Solution

The fourth proportional to 20,723.40, 31,085.10 and 18,131.40 is: 27,197.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,723.40 : 31,085.10 = 18,131.40 : x
  2. Step 2: Convert to fraction form
    20,723.40/31,085.10 = 18,131.40/x
  3. Step 3: Cross multiply
    20,723.40x = 31,085.10 × 18,131.40
  4. Step 4: Simplify right side
    20,723.40x = 563,616,382.14
  5. Step 5: Solve for x
    x = 563,616,382.14/20,723.40
  6. Step 6: Final answer
    x = 27,197.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.