Home / 15,375.89-21,219.23-8,661.65

Finding the Fourth Proportional to 15,375.89, 21,219.23 and 8,661.65

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Solution

The fourth proportional to 15,375.89, 21,219.23 and 8,661.65 is: 11,953.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.89 : 21,219.23 = 8,661.65 : x
  2. Step 2: Convert to fraction form
    15,375.89/21,219.23 = 8,661.65/x
  3. Step 3: Cross multiply
    15,375.89x = 21,219.23 × 8,661.65
  4. Step 4: Simplify right side
    15,375.89x = 183,793,459.09
  5. Step 5: Solve for x
    x = 183,793,459.09/15,375.89
  6. Step 6: Final answer
    x = 11,953.35

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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.