Home / 15,661.75-21,613.28-8,491.67

Finding the Fourth Proportional to 15,661.75, 21,613.28 and 8,491.67

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Solution

The fourth proportional to 15,661.75, 21,613.28 and 8,491.67 is: 11,718.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.75 : 21,613.28 = 8,491.67 : x
  2. Step 2: Convert to fraction form
    15,661.75/21,613.28 = 8,491.67/x
  3. Step 3: Cross multiply
    15,661.75x = 21,613.28 × 8,491.67
  4. Step 4: Simplify right side
    15,661.75x = 183,532,841.38
  5. Step 5: Solve for x
    x = 183,532,841.38/15,661.75
  6. Step 6: Final answer
    x = 11,718.54

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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.