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Finding the Fourth Proportional to 13,985,679.60, 20,978,519.40 and 4,403,995.20

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Solution

The fourth proportional to 13,985,679.60, 20,978,519.40 and 4,403,995.20 is: 6,605,992.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985,679.60 : 20,978,519.40 = 4,403,995.20 : x
  2. Step 2: Convert to fraction form
    13,985,679.60/20,978,519.40 = 4,403,995.20/x
  3. Step 3: Cross multiply
    13,985,679.60x = 20,978,519.40 × 4,403,995.20
  4. Step 4: Simplify right side
    13,985,679.60x = 92,389,298,740,706.88
  5. Step 5: Solve for x
    x = 92,389,298,740,706.88/13,985,679.60
  6. Step 6: Final answer
    x = 6,605,992.80

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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.