Home / 21,266.59-31,881.39-8,778.82

Finding the Fourth Proportional to 21,266.59, 31,881.39 and 8,778.82

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Solution

The fourth proportional to 21,266.59, 31,881.39 and 8,778.82 is: 13,160.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,266.59 : 31,881.39 = 8,778.82 : x
  2. Step 2: Convert to fraction form
    21,266.59/31,881.39 = 8,778.82/x
  3. Step 3: Cross multiply
    21,266.59x = 31,881.39 × 8,778.82
  4. Step 4: Simplify right side
    21,266.59x = 279,880,984.16
  5. Step 5: Solve for x
    x = 279,880,984.16/21,266.59
  6. Step 6: Final answer
    x = 13,160.60

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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.