Home / 28,238.12-38,968.33-15,491.05

Finding the Fourth Proportional to 28,238.12, 38,968.33 and 15,491.05

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Solution

The fourth proportional to 28,238.12, 38,968.33 and 15,491.05 is: 21,377.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.12 : 38,968.33 = 15,491.05 : x
  2. Step 2: Convert to fraction form
    28,238.12/38,968.33 = 15,491.05/x
  3. Step 3: Cross multiply
    28,238.12x = 38,968.33 × 15,491.05
  4. Step 4: Simplify right side
    28,238.12x = 603,660,348.45
  5. Step 5: Solve for x
    x = 603,660,348.45/28,238.12
  6. Step 6: Final answer
    x = 21,377.50

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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.