Home / 15,688.85-21,654.59-8,976.56

Finding the Fourth Proportional to 15,688.85, 21,654.59 and 8,976.56

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Solution

The fourth proportional to 15,688.85, 21,654.59 and 8,976.56 is: 12,389.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.85 : 21,654.59 = 8,976.56 : x
  2. Step 2: Convert to fraction form
    15,688.85/21,654.59 = 8,976.56/x
  3. Step 3: Cross multiply
    15,688.85x = 21,654.59 × 8,976.56
  4. Step 4: Simplify right side
    15,688.85x = 194,383,573.25
  5. Step 5: Solve for x
    x = 194,383,573.25/15,688.85
  6. Step 6: Final answer
    x = 12,389.92

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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.