Home / 21,185.55-31,772.99-8,709.05

Finding the Fourth Proportional to 21,185.55, 31,772.99 and 8,709.05

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Solution

The fourth proportional to 21,185.55, 31,772.99 and 8,709.05 is: 13,061.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.55 : 31,772.99 = 8,709.05 : x
  2. Step 2: Convert to fraction form
    21,185.55/31,772.99 = 8,709.05/x
  3. Step 3: Cross multiply
    21,185.55x = 31,772.99 × 8,709.05
  4. Step 4: Simplify right side
    21,185.55x = 276,712,659.76
  5. Step 5: Solve for x
    x = 276,712,659.76/21,185.55
  6. Step 6: Final answer
    x = 13,061.39

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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.