Home / 20,309.40-28,023.53-11,356.97

Finding the Fourth Proportional to 20,309.40, 28,023.53 and 11,356.97

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Solution

The fourth proportional to 20,309.40, 28,023.53 and 11,356.97 is: 15,670.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,309.40 : 28,023.53 = 11,356.97 : x
  2. Step 2: Convert to fraction form
    20,309.40/28,023.53 = 11,356.97/x
  3. Step 3: Cross multiply
    20,309.40x = 28,023.53 × 11,356.97
  4. Step 4: Simplify right side
    20,309.40x = 318,262,192.60
  5. Step 5: Solve for x
    x = 318,262,192.60/20,309.40
  6. Step 6: Final answer
    x = 15,670.68

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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.