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Finding the Fourth Proportional to 7,224.95, 9,966.61 and 7,021.64

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Solution

The fourth proportional to 7,224.95, 9,966.61 and 7,021.64 is: 9,686.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,224.95 : 9,966.61 = 7,021.64 : x
  2. Step 2: Convert to fraction form
    7,224.95/9,966.61 = 7,021.64/x
  3. Step 3: Cross multiply
    7,224.95x = 9,966.61 × 7,021.64
  4. Step 4: Simplify right side
    7,224.95x = 69,981,981.13
  5. Step 5: Solve for x
    x = 69,981,981.13/7,224.95
  6. Step 6: Final answer
    x = 9,686.15

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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.