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Finding the Fourth Proportional to 7,154.64, 9,820.74 and 6,351.12

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Solution

The fourth proportional to 7,154.64, 9,820.74 and 6,351.12 is: 8,717.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,154.64 : 9,820.74 = 6,351.12 : x
  2. Step 2: Convert to fraction form
    7,154.64/9,820.74 = 6,351.12/x
  3. Step 3: Cross multiply
    7,154.64x = 9,820.74 × 6,351.12
  4. Step 4: Simplify right side
    7,154.64x = 62,372,698.23
  5. Step 5: Solve for x
    x = 62,372,698.23/7,154.64
  6. Step 6: Final answer
    x = 8,717.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.