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Finding the Fourth Proportional to 10,998.51, 15,158.12 and 8,009.61

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Solution

The fourth proportional to 10,998.51, 15,158.12 and 8,009.61 is: 11,038.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,998.51 : 15,158.12 = 8,009.61 : x
  2. Step 2: Convert to fraction form
    10,998.51/15,158.12 = 8,009.61/x
  3. Step 3: Cross multiply
    10,998.51x = 15,158.12 × 8,009.61
  4. Step 4: Simplify right side
    10,998.51x = 121,410,589.49
  5. Step 5: Solve for x
    x = 121,410,589.49/10,998.51
  6. Step 6: Final answer
    x = 11,038.82

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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.