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Finding the Fourth Proportional to 18,258.58, 27,388.14 and 5,111.20

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Solution

The fourth proportional to 18,258.58, 27,388.14 and 5,111.20 is: 7,666.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,258.58 : 27,388.14 = 5,111.20 : x
  2. Step 2: Convert to fraction form
    18,258.58/27,388.14 = 5,111.20/x
  3. Step 3: Cross multiply
    18,258.58x = 27,388.14 × 5,111.20
  4. Step 4: Simplify right side
    18,258.58x = 139,986,261.17
  5. Step 5: Solve for x
    x = 139,986,261.17/18,258.58
  6. Step 6: Final answer
    x = 7,666.88

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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.