Home / 20,580.86-28,401.60-11,149.46

Finding the Fourth Proportional to 20,580.86, 28,401.60 and 11,149.46

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Solution

The fourth proportional to 20,580.86, 28,401.60 and 11,149.46 is: 15,386.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.86 : 28,401.60 = 11,149.46 : x
  2. Step 2: Convert to fraction form
    20,580.86/28,401.60 = 11,149.46/x
  3. Step 3: Cross multiply
    20,580.86x = 28,401.60 × 11,149.46
  4. Step 4: Simplify right side
    20,580.86x = 316,662,503.14
  5. Step 5: Solve for x
    x = 316,662,503.14/20,580.86
  6. Step 6: Final answer
    x = 15,386.26

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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.