Home / 15,326.89-21,150.88-8,520.65

Finding the Fourth Proportional to 15,326.89, 21,150.88 and 8,520.65

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Solution

The fourth proportional to 15,326.89, 21,150.88 and 8,520.65 is: 11,758.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,326.89 : 21,150.88 = 8,520.65 : x
  2. Step 2: Convert to fraction form
    15,326.89/21,150.88 = 8,520.65/x
  3. Step 3: Cross multiply
    15,326.89x = 21,150.88 × 8,520.65
  4. Step 4: Simplify right side
    15,326.89x = 180,219,245.67
  5. Step 5: Solve for x
    x = 180,219,245.67/15,326.89
  6. Step 6: Final answer
    x = 11,758.37

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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.