Home / 31,428.50-43,371.33-18,857.30

Finding the Fourth Proportional to 31,428.50, 43,371.33 and 18,857.30

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Solution

The fourth proportional to 31,428.50, 43,371.33 and 18,857.30 is: 26,023.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,428.50 : 43,371.33 = 18,857.30 : x
  2. Step 2: Convert to fraction form
    31,428.50/43,371.33 = 18,857.30/x
  3. Step 3: Cross multiply
    31,428.50x = 43,371.33 × 18,857.30
  4. Step 4: Simplify right side
    31,428.50x = 817,866,181.21
  5. Step 5: Solve for x
    x = 817,866,181.21/31,428.50
  6. Step 6: Final answer
    x = 26,023.07

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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.