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Finding the Fourth Proportional to 5,661.80, 7,820.76 and 4,720.67

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Solution

The fourth proportional to 5,661.80, 7,820.76 and 4,720.67 is: 6,520.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,661.80 : 7,820.76 = 4,720.67 : x
  2. Step 2: Convert to fraction form
    5,661.80/7,820.76 = 4,720.67/x
  3. Step 3: Cross multiply
    5,661.80x = 7,820.76 × 4,720.67
  4. Step 4: Simplify right side
    5,661.80x = 36,919,227.11
  5. Step 5: Solve for x
    x = 36,919,227.11/5,661.80
  6. Step 6: Final answer
    x = 6,520.76

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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.