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Finding the Fourth Proportional to 9,642.72, 13,301.64 and 6,660.12

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Solution

The fourth proportional to 9,642.72, 13,301.64 and 6,660.12 is: 9,187.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,642.72 : 13,301.64 = 6,660.12 : x
  2. Step 2: Convert to fraction form
    9,642.72/13,301.64 = 6,660.12/x
  3. Step 3: Cross multiply
    9,642.72x = 13,301.64 × 6,660.12
  4. Step 4: Simplify right side
    9,642.72x = 88,590,518.60
  5. Step 5: Solve for x
    x = 88,590,518.60/9,642.72
  6. Step 6: Final answer
    x = 9,187.30

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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.