Home / 28,388.70-39,176.19-15,813.18

Finding the Fourth Proportional to 28,388.70, 39,176.19 and 15,813.18

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Solution

The fourth proportional to 28,388.70, 39,176.19 and 15,813.18 is: 21,822.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,388.70 : 39,176.19 = 15,813.18 : x
  2. Step 2: Convert to fraction form
    28,388.70/39,176.19 = 15,813.18/x
  3. Step 3: Cross multiply
    28,388.70x = 39,176.19 × 15,813.18
  4. Step 4: Simplify right side
    28,388.70x = 619,500,144.18
  5. Step 5: Solve for x
    x = 619,500,144.18/28,388.70
  6. Step 6: Final answer
    x = 21,822.07

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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.