Home / 21,865.14-30,178.89-12,794.67

Finding the Fourth Proportional to 21,865.14, 30,178.89 and 12,794.67

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Solution

The fourth proportional to 21,865.14, 30,178.89 and 12,794.67 is: 17,659.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,865.14 : 30,178.89 = 12,794.67 : x
  2. Step 2: Convert to fraction form
    21,865.14/30,178.89 = 12,794.67/x
  3. Step 3: Cross multiply
    21,865.14x = 30,178.89 × 12,794.67
  4. Step 4: Simplify right side
    21,865.14x = 386,128,938.52
  5. Step 5: Solve for x
    x = 386,128,938.52/21,865.14
  6. Step 6: Final answer
    x = 17,659.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.