Home / 20,518.79-28,314.23-11,568.50

Finding the Fourth Proportional to 20,518.79, 28,314.23 and 11,568.50

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Solution

The fourth proportional to 20,518.79, 28,314.23 and 11,568.50 is: 15,963.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.79 : 28,314.23 = 11,568.50 : x
  2. Step 2: Convert to fraction form
    20,518.79/28,314.23 = 11,568.50/x
  3. Step 3: Cross multiply
    20,518.79x = 28,314.23 × 11,568.50
  4. Step 4: Simplify right side
    20,518.79x = 327,553,057.11
  5. Step 5: Solve for x
    x = 327,553,057.11/20,518.79
  6. Step 6: Final answer
    x = 15,963.56

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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.