Home / 21,086.12-31,678.49-18,133.67

Finding the Fourth Proportional to 21,086.12, 31,678.49 and 18,133.67

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Solution

The fourth proportional to 21,086.12, 31,678.49 and 18,133.67 is: 27,242.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.12 : 31,678.49 = 18,133.67 : x
  2. Step 2: Convert to fraction form
    21,086.12/31,678.49 = 18,133.67/x
  3. Step 3: Cross multiply
    21,086.12x = 31,678.49 × 18,133.67
  4. Step 4: Simplify right side
    21,086.12x = 574,447,408.29
  5. Step 5: Solve for x
    x = 574,447,408.29/21,086.12
  6. Step 6: Final answer
    x = 27,242.91

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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.