Home / 20,354.13-28,088.19-11,401.57

Finding the Fourth Proportional to 20,354.13, 28,088.19 and 11,401.57

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Solution

The fourth proportional to 20,354.13, 28,088.19 and 11,401.57 is: 15,733.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,354.13 : 28,088.19 = 11,401.57 : x
  2. Step 2: Convert to fraction form
    20,354.13/28,088.19 = 11,401.57/x
  3. Step 3: Cross multiply
    20,354.13x = 28,088.19 × 11,401.57
  4. Step 4: Simplify right side
    20,354.13x = 320,249,394.24
  5. Step 5: Solve for x
    x = 320,249,394.24/20,354.13
  6. Step 6: Final answer
    x = 15,733.88

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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.