Home / 20,580.63-28,401.35-11,149.17

Finding the Fourth Proportional to 20,580.63, 28,401.35 and 11,149.17

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Solution

The fourth proportional to 20,580.63, 28,401.35 and 11,149.17 is: 15,385.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.63 : 28,401.35 = 11,149.17 : x
  2. Step 2: Convert to fraction form
    20,580.63/28,401.35 = 11,149.17/x
  3. Step 3: Cross multiply
    20,580.63x = 28,401.35 × 11,149.17
  4. Step 4: Simplify right side
    20,580.63x = 316,651,423.63
  5. Step 5: Solve for x
    x = 316,651,423.63/20,580.63
  6. Step 6: Final answer
    x = 15,385.90

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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.