Home / 21,087.12-31,679.99-18,134.67

Finding the Fourth Proportional to 21,087.12, 31,679.99 and 18,134.67

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Solution

The fourth proportional to 21,087.12, 31,679.99 and 18,134.67 is: 27,244.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.12 : 31,679.99 = 18,134.67 : x
  2. Step 2: Convert to fraction form
    21,087.12/31,679.99 = 18,134.67/x
  3. Step 3: Cross multiply
    21,087.12x = 31,679.99 × 18,134.67
  4. Step 4: Simplify right side
    21,087.12x = 574,506,164.25
  5. Step 5: Solve for x
    x = 574,506,164.25/21,087.12
  6. Step 6: Final answer
    x = 27,244.41

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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.