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Finding the Fourth Proportional to 6,972.32, 9,621.21 and 3,987.67

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Solution

The fourth proportional to 6,972.32, 9,621.21 and 3,987.67 is: 5,502.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,972.32 : 9,621.21 = 3,987.67 : x
  2. Step 2: Convert to fraction form
    6,972.32/9,621.21 = 3,987.67/x
  3. Step 3: Cross multiply
    6,972.32x = 9,621.21 × 3,987.67
  4. Step 4: Simplify right side
    6,972.32x = 38,366,210.48
  5. Step 5: Solve for x
    x = 38,366,210.48/6,972.32
  6. Step 6: Final answer
    x = 5,502.65

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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.