Home / 20,353.95-28,088.12-11,401.42

Finding the Fourth Proportional to 20,353.95, 28,088.12 and 11,401.42

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Solution

The fourth proportional to 20,353.95, 28,088.12 and 11,401.42 is: 15,733.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,353.95 : 28,088.12 = 11,401.42 : x
  2. Step 2: Convert to fraction form
    20,353.95/28,088.12 = 11,401.42/x
  3. Step 3: Cross multiply
    20,353.95x = 28,088.12 × 11,401.42
  4. Step 4: Simplify right side
    20,353.95x = 320,244,453.13
  5. Step 5: Solve for x
    x = 320,244,453.13/20,353.95
  6. Step 6: Final answer
    x = 15,733.77

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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.