Home / 20,971,347.40-31,416,720.12-12,860,672.12

Finding the Fourth Proportional to 20,971,347.40, 31,416,720.12 and 12,860,672.12

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Solution

The fourth proportional to 20,971,347.40, 31,416,720.12 and 12,860,672.12 is: 19,266,293.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971,347.40 : 31,416,720.12 = 12,860,672.12 : x
  2. Step 2: Convert to fraction form
    20,971,347.40/31,416,720.12 = 12,860,672.12/x
  3. Step 3: Cross multiply
    20,971,347.40x = 31,416,720.12 × 12,860,672.12
  4. Step 4: Simplify right side
    20,971,347.40x = 404,040,136,549,127.06
  5. Step 5: Solve for x
    x = 404,040,136,549,127.06/20,971,347.40
  6. Step 6: Final answer
    x = 19,266,293.62

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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.