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Finding the Fourth Proportional to 15,065.05, 20,790.13 and 8,259.46

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Solution

The fourth proportional to 15,065.05, 20,790.13 and 8,259.46 is: 11,398.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,065.05 : 20,790.13 = 8,259.46 : x
  2. Step 2: Convert to fraction form
    15,065.05/20,790.13 = 8,259.46/x
  3. Step 3: Cross multiply
    15,065.05x = 20,790.13 × 8,259.46
  4. Step 4: Simplify right side
    15,065.05x = 171,715,143.18
  5. Step 5: Solve for x
    x = 171,715,143.18/15,065.05
  6. Step 6: Final answer
    x = 11,398.25

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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.