Home / 15,428.35-21,292.37-8,715.61

Finding the Fourth Proportional to 15,428.35, 21,292.37 and 8,715.61

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Solution

The fourth proportional to 15,428.35, 21,292.37 and 8,715.61 is: 12,028.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.35 : 21,292.37 = 8,715.61 : x
  2. Step 2: Convert to fraction form
    15,428.35/21,292.37 = 8,715.61/x
  3. Step 3: Cross multiply
    15,428.35x = 21,292.37 × 8,715.61
  4. Step 4: Simplify right side
    15,428.35x = 185,575,992.90
  5. Step 5: Solve for x
    x = 185,575,992.90/15,428.35
  6. Step 6: Final answer
    x = 12,028.25

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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.