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Finding the Fourth Proportional to 6,969.72, 9,621.95 and 5,372.88

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Solution

The fourth proportional to 6,969.72, 9,621.95 and 5,372.88 is: 7,417.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,969.72 : 9,621.95 = 5,372.88 : x
  2. Step 2: Convert to fraction form
    6,969.72/9,621.95 = 5,372.88/x
  3. Step 3: Cross multiply
    6,969.72x = 9,621.95 × 5,372.88
  4. Step 4: Simplify right side
    6,969.72x = 51,697,555.85
  5. Step 5: Solve for x
    x = 51,697,555.85/6,969.72
  6. Step 6: Final answer
    x = 7,417.45

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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.