Home / 20,158.18-27,820.18-11,208.48

Finding the Fourth Proportional to 20,158.18, 27,820.18 and 11,208.48

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Solution

The fourth proportional to 20,158.18, 27,820.18 and 11,208.48 is: 15,468.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,158.18 : 27,820.18 = 11,208.48 : x
  2. Step 2: Convert to fraction form
    20,158.18/27,820.18 = 11,208.48/x
  3. Step 3: Cross multiply
    20,158.18x = 27,820.18 × 11,208.48
  4. Step 4: Simplify right side
    20,158.18x = 311,821,931.13
  5. Step 5: Solve for x
    x = 311,821,931.13/20,158.18
  6. Step 6: Final answer
    x = 15,468.75

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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.