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Finding the Fourth Proportional to 7,407.21, 11,045.48 and 7,340.54

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Solution

The fourth proportional to 7,407.21, 11,045.48 and 7,340.54 is: 10,946.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,407.21 : 11,045.48 = 7,340.54 : x
  2. Step 2: Convert to fraction form
    7,407.21/11,045.48 = 7,340.54/x
  3. Step 3: Cross multiply
    7,407.21x = 11,045.48 × 7,340.54
  4. Step 4: Simplify right side
    7,407.21x = 81,079,695.83
  5. Step 5: Solve for x
    x = 81,079,695.83/7,407.21
  6. Step 6: Final answer
    x = 10,946.05

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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.