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Finding the Fourth Proportional to 7,919.80, 10,943.79 and 7,535.51

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Solution

The fourth proportional to 7,919.80, 10,943.79 and 7,535.51 is: 10,412.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.80 : 10,943.79 = 7,535.51 : x
  2. Step 2: Convert to fraction form
    7,919.80/10,943.79 = 7,535.51/x
  3. Step 3: Cross multiply
    7,919.80x = 10,943.79 × 7,535.51
  4. Step 4: Simplify right side
    7,919.80x = 82,467,038.98
  5. Step 5: Solve for x
    x = 82,467,038.98/7,919.80
  6. Step 6: Final answer
    x = 10,412.77

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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.