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Finding the Fourth Proportional to 7,428.64, 11,092.04 and 7,159.84

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Solution

The fourth proportional to 7,428.64, 11,092.04 and 7,159.84 is: 10,690.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428.64 : 11,092.04 = 7,159.84 : x
  2. Step 2: Convert to fraction form
    7,428.64/11,092.04 = 7,159.84/x
  3. Step 3: Cross multiply
    7,428.64x = 11,092.04 × 7,159.84
  4. Step 4: Simplify right side
    7,428.64x = 79,417,231.67
  5. Step 5: Solve for x
    x = 79,417,231.67/7,428.64
  6. Step 6: Final answer
    x = 10,690.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.