Home / 15,564.92-21,479.64-8,491.49

Finding the Fourth Proportional to 15,564.92, 21,479.64 and 8,491.49

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Solution

The fourth proportional to 15,564.92, 21,479.64 and 8,491.49 is: 11,718.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.92 : 21,479.64 = 8,491.49 : x
  2. Step 2: Convert to fraction form
    15,564.92/21,479.64 = 8,491.49/x
  3. Step 3: Cross multiply
    15,564.92x = 21,479.64 × 8,491.49
  4. Step 4: Simplify right side
    15,564.92x = 182,394,148.26
  5. Step 5: Solve for x
    x = 182,394,148.26/15,564.92
  6. Step 6: Final answer
    x = 11,718.28

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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.