Home / 18,518.90-27,773.40-5,191.15

Finding the Fourth Proportional to 18,518.90, 27,773.40 and 5,191.15

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Solution

The fourth proportional to 18,518.90, 27,773.40 and 5,191.15 is: 7,785.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,518.90 : 27,773.40 = 5,191.15 : x
  2. Step 2: Convert to fraction form
    18,518.90/27,773.40 = 5,191.15/x
  3. Step 3: Cross multiply
    18,518.90x = 27,773.40 × 5,191.15
  4. Step 4: Simplify right side
    18,518.90x = 144,175,885.41
  5. Step 5: Solve for x
    x = 144,175,885.41/18,518.90
  6. Step 6: Final answer
    x = 7,785.34

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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.