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Finding the Fourth Proportional to 7,389.63, 11,026.13 and 7,221.56

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Solution

The fourth proportional to 7,389.63, 11,026.13 and 7,221.56 is: 10,775.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,389.63 : 11,026.13 = 7,221.56 : x
  2. Step 2: Convert to fraction form
    7,389.63/11,026.13 = 7,221.56/x
  3. Step 3: Cross multiply
    7,389.63x = 11,026.13 × 7,221.56
  4. Step 4: Simplify right side
    7,389.63x = 79,625,768.12
  5. Step 5: Solve for x
    x = 79,625,768.12/7,389.63
  6. Step 6: Final answer
    x = 10,775.34

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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.