Home / 12,985,331.40-19,477,997.10-12,489,319.80

Finding the Fourth Proportional to 12,985,331.40, 19,477,997.10 and 12,489,319.80

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Solution

The fourth proportional to 12,985,331.40, 19,477,997.10 and 12,489,319.80 is: 18,733,979.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985,331.40 : 19,477,997.10 = 12,489,319.80 : x
  2. Step 2: Convert to fraction form
    12,985,331.40/19,477,997.10 = 12,489,319.80/x
  3. Step 3: Cross multiply
    12,985,331.40x = 19,477,997.10 × 12,489,319.80
  4. Step 4: Simplify right side
    12,985,331.40x = 243,266,934,845,372.62
  5. Step 5: Solve for x
    x = 243,266,934,845,372.62/12,985,331.40
  6. Step 6: Final answer
    x = 18,733,979.70

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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.