Home / 20,391.01-28,140.39-11,316.31

Finding the Fourth Proportional to 20,391.01, 28,140.39 and 11,316.31

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Solution

The fourth proportional to 20,391.01, 28,140.39 and 11,316.31 is: 15,616.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.01 : 28,140.39 = 11,316.31 : x
  2. Step 2: Convert to fraction form
    20,391.01/28,140.39 = 11,316.31/x
  3. Step 3: Cross multiply
    20,391.01x = 28,140.39 × 11,316.31
  4. Step 4: Simplify right side
    20,391.01x = 318,445,376.76
  5. Step 5: Solve for x
    x = 318,445,376.76/20,391.01
  6. Step 6: Final answer
    x = 15,616.95

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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.