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Finding the Fourth Proportional to 13,997,987.40, 20,996,981.10 and 3,900,608.40

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Solution

The fourth proportional to 13,997,987.40, 20,996,981.10 and 3,900,608.40 is: 5,850,912.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,997,987.40 : 20,996,981.10 = 3,900,608.40 : x
  2. Step 2: Convert to fraction form
    13,997,987.40/20,996,981.10 = 3,900,608.40/x
  3. Step 3: Cross multiply
    13,997,987.40x = 20,996,981.10 × 3,900,608.40
  4. Step 4: Simplify right side
    13,997,987.40x = 81,901,000,853,301.25
  5. Step 5: Solve for x
    x = 81,901,000,853,301.25/13,997,987.40
  6. Step 6: Final answer
    x = 5,850,912.60

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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.