Home / 15,743.45-21,725.78-8,938.76

Finding the Fourth Proportional to 15,743.45, 21,725.78 and 8,938.76

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Solution

The fourth proportional to 15,743.45, 21,725.78 and 8,938.76 is: 12,335.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,743.45 : 21,725.78 = 8,938.76 : x
  2. Step 2: Convert to fraction form
    15,743.45/21,725.78 = 8,938.76/x
  3. Step 3: Cross multiply
    15,743.45x = 21,725.78 × 8,938.76
  4. Step 4: Simplify right side
    15,743.45x = 194,201,379.91
  5. Step 5: Solve for x
    x = 194,201,379.91/15,743.45
  6. Step 6: Final answer
    x = 12,335.37

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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.