Home / 21,006.96-31,515.90-7,860.36

Finding the Fourth Proportional to 21,006.96, 31,515.90 and 7,860.36

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Solution

The fourth proportional to 21,006.96, 31,515.90 and 7,860.36 is: 11,792.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.96 : 31,515.90 = 7,860.36 : x
  2. Step 2: Convert to fraction form
    21,006.96/31,515.90 = 7,860.36/x
  3. Step 3: Cross multiply
    21,006.96x = 31,515.90 × 7,860.36
  4. Step 4: Simplify right side
    21,006.96x = 247,726,319.72
  5. Step 5: Solve for x
    x = 247,726,319.72/21,006.96
  6. Step 6: Final answer
    x = 11,792.58

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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.