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Finding the Fourth Proportional to 10,998.30, 16,486.65 and 9,831.90

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Solution

The fourth proportional to 10,998.30, 16,486.65 and 9,831.90 is: 14,738.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,998.30 : 16,486.65 = 9,831.90 : x
  2. Step 2: Convert to fraction form
    10,998.30/16,486.65 = 9,831.90/x
  3. Step 3: Cross multiply
    10,998.30x = 16,486.65 × 9,831.90
  4. Step 4: Simplify right side
    10,998.30x = 162,095,094.14
  5. Step 5: Solve for x
    x = 162,095,094.14/10,998.30
  6. Step 6: Final answer
    x = 14,738.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.