Home / 20,706,711.90-31,024,638.45-13,124,820.30

Finding the Fourth Proportional to 20,706,711.90, 31,024,638.45 and 13,124,820.30

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Solution

The fourth proportional to 20,706,711.90, 31,024,638.45 and 13,124,820.30 is: 19,664,773.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706,711.90 : 31,024,638.45 = 13,124,820.30 : x
  2. Step 2: Convert to fraction form
    20,706,711.90/31,024,638.45 = 13,124,820.30/x
  3. Step 3: Cross multiply
    20,706,711.90x = 31,024,638.45 × 13,124,820.30
  4. Step 4: Simplify right side
    20,706,711.90x = 407,192,804,528,720.56
  5. Step 5: Solve for x
    x = 407,192,804,528,720.56/20,706,711.90
  6. Step 6: Final answer
    x = 19,664,773.75

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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.