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Finding the Fourth Proportional to 10,986.70, 16,480.05 and 9,820.30

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Solution

The fourth proportional to 10,986.70, 16,480.05 and 9,820.30 is: 14,730.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,986.70 : 16,480.05 = 9,820.30 : x
  2. Step 2: Convert to fraction form
    10,986.70/16,480.05 = 9,820.30/x
  3. Step 3: Cross multiply
    10,986.70x = 16,480.05 × 9,820.30
  4. Step 4: Simplify right side
    10,986.70x = 161,839,035.02
  5. Step 5: Solve for x
    x = 161,839,035.02/10,986.70
  6. Step 6: Final answer
    x = 14,730.45

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1.5x scale

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.