Home / 15,775.91-21,770.11-8,702.33

Finding the Fourth Proportional to 15,775.91, 21,770.11 and 8,702.33

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Solution

The fourth proportional to 15,775.91, 21,770.11 and 8,702.33 is: 12,008.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,775.91 : 21,770.11 = 8,702.33 : x
  2. Step 2: Convert to fraction form
    15,775.91/21,770.11 = 8,702.33/x
  3. Step 3: Cross multiply
    15,775.91x = 21,770.11 × 8,702.33
  4. Step 4: Simplify right side
    15,775.91x = 189,450,681.36
  5. Step 5: Solve for x
    x = 189,450,681.36/15,775.91
  6. Step 6: Final answer
    x = 12,008.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.