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Finding the Fourth Proportional to 7,239.58, 9,990.95 and 5,664.94

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Solution

The fourth proportional to 7,239.58, 9,990.95 and 5,664.94 is: 7,817.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.58 : 9,990.95 = 5,664.94 : x
  2. Step 2: Convert to fraction form
    7,239.58/9,990.95 = 5,664.94/x
  3. Step 3: Cross multiply
    7,239.58x = 9,990.95 × 5,664.94
  4. Step 4: Simplify right side
    7,239.58x = 56,598,078.99
  5. Step 5: Solve for x
    x = 56,598,078.99/7,239.58
  6. Step 6: Final answer
    x = 7,817.87

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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.