Home / 21,818.70-30,113.72-12,865.67

Finding the Fourth Proportional to 21,818.70, 30,113.72 and 12,865.67

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Solution

The fourth proportional to 21,818.70, 30,113.72 and 12,865.67 is: 17,756.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.70 : 30,113.72 = 12,865.67 : x
  2. Step 2: Convert to fraction form
    21,818.70/30,113.72 = 12,865.67/x
  3. Step 3: Cross multiply
    21,818.70x = 30,113.72 × 12,865.67
  4. Step 4: Simplify right side
    21,818.70x = 387,433,202.64
  5. Step 5: Solve for x
    x = 387,433,202.64/21,818.70
  6. Step 6: Final answer
    x = 17,756.93

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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.