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Finding the Fourth Proportional to 10,003.40, 15,005.10 and 9,128.60

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Solution

The fourth proportional to 10,003.40, 15,005.10 and 9,128.60 is: 13,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,003.40 : 15,005.10 = 9,128.60 : x
  2. Step 2: Convert to fraction form
    10,003.40/15,005.10 = 9,128.60/x
  3. Step 3: Cross multiply
    10,003.40x = 15,005.10 × 9,128.60
  4. Step 4: Simplify right side
    10,003.40x = 136,975,555.86
  5. Step 5: Solve for x
    x = 136,975,555.86/10,003.40
  6. Step 6: Final answer
    x = 13,692.90

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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.