Home / 13,391.78-20,090.21-5,387.16

Finding the Fourth Proportional to 13,391.78, 20,090.21 and 5,387.16

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Solution

The fourth proportional to 13,391.78, 20,090.21 and 5,387.16 is: 8,081.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.78 : 20,090.21 = 5,387.16 : x
  2. Step 2: Convert to fraction form
    13,391.78/20,090.21 = 5,387.16/x
  3. Step 3: Cross multiply
    13,391.78x = 20,090.21 × 5,387.16
  4. Step 4: Simplify right side
    13,391.78x = 108,229,254.41
  5. Step 5: Solve for x
    x = 108,229,254.41/13,391.78
  6. Step 6: Final answer
    x = 8,081.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.