Home / 13,615.83-20,388.11-8,921.07

Finding the Fourth Proportional to 13,615.83, 20,388.11 and 8,921.07

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Solution

The fourth proportional to 13,615.83, 20,388.11 and 8,921.07 is: 13,358.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.83 : 20,388.11 = 8,921.07 : x
  2. Step 2: Convert to fraction form
    13,615.83/20,388.11 = 8,921.07/x
  3. Step 3: Cross multiply
    13,615.83x = 20,388.11 × 8,921.07
  4. Step 4: Simplify right side
    13,615.83x = 181,883,711.87
  5. Step 5: Solve for x
    x = 181,883,711.87/13,615.83
  6. Step 6: Final answer
    x = 13,358.25

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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.