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Finding the Fourth Proportional to 26,488.64, 39,728.04 and 7,764.56

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Solution

The fourth proportional to 26,488.64, 39,728.04 and 7,764.56 is: 11,645.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,488.64 : 39,728.04 = 7,764.56 : x
  2. Step 2: Convert to fraction form
    26,488.64/39,728.04 = 7,764.56/x
  3. Step 3: Cross multiply
    26,488.64x = 39,728.04 × 7,764.56
  4. Step 4: Simplify right side
    26,488.64x = 308,470,750.26
  5. Step 5: Solve for x
    x = 308,470,750.26/26,488.64
  6. Step 6: Final answer
    x = 11,645.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.