Home / 28,428.28-39,247.06-19,712.68

Finding the Fourth Proportional to 28,428.28, 39,247.06 and 19,712.68

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Solution

The fourth proportional to 28,428.28, 39,247.06 and 19,712.68 is: 27,214.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.28 : 39,247.06 = 19,712.68 : x
  2. Step 2: Convert to fraction form
    28,428.28/39,247.06 = 19,712.68/x
  3. Step 3: Cross multiply
    28,428.28x = 39,247.06 × 19,712.68
  4. Step 4: Simplify right side
    28,428.28x = 773,664,734.72
  5. Step 5: Solve for x
    x = 773,664,734.72/28,428.28
  6. Step 6: Final answer
    x = 27,214.62

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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.