Home / 18,121.74-27,156.89-7,580.40

Finding the Fourth Proportional to 18,121.74, 27,156.89 and 7,580.40

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Solution

The fourth proportional to 18,121.74, 27,156.89 and 7,580.40 is: 11,359.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.74 : 27,156.89 = 7,580.40 : x
  2. Step 2: Convert to fraction form
    18,121.74/27,156.89 = 7,580.40/x
  3. Step 3: Cross multiply
    18,121.74x = 27,156.89 × 7,580.40
  4. Step 4: Simplify right side
    18,121.74x = 205,860,088.96
  5. Step 5: Solve for x
    x = 205,860,088.96/18,121.74
  6. Step 6: Final answer
    x = 11,359.84

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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.