Home / 28,428.30-39,213.72-18,868.68

Finding the Fourth Proportional to 28,428.30, 39,213.72 and 18,868.68

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Solution

The fourth proportional to 28,428.30, 39,213.72 and 18,868.68 is: 26,027.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.30 : 39,213.72 = 18,868.68 : x
  2. Step 2: Convert to fraction form
    28,428.30/39,213.72 = 18,868.68/x
  3. Step 3: Cross multiply
    28,428.30x = 39,213.72 × 18,868.68
  4. Step 4: Simplify right side
    28,428.30x = 739,911,134.29
  5. Step 5: Solve for x
    x = 739,911,134.29/28,428.30
  6. Step 6: Final answer
    x = 26,027.27

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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.