Home / 21,269.10-31,915.80-8,130.90

Finding the Fourth Proportional to 21,269.10, 31,915.80 and 8,130.90

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Solution

The fourth proportional to 21,269.10, 31,915.80 and 8,130.90 is: 12,200.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.10 : 31,915.80 = 8,130.90 : x
  2. Step 2: Convert to fraction form
    21,269.10/31,915.80 = 8,130.90/x
  3. Step 3: Cross multiply
    21,269.10x = 31,915.80 × 8,130.90
  4. Step 4: Simplify right side
    21,269.10x = 259,504,178.22
  5. Step 5: Solve for x
    x = 259,504,178.22/21,269.10
  6. Step 6: Final answer
    x = 12,200.99

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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.