Home / 15,564.86-21,479.66-8,491.42

Finding the Fourth Proportional to 15,564.86, 21,479.66 and 8,491.42

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Solution

The fourth proportional to 15,564.86, 21,479.66 and 8,491.42 is: 11,718.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.86 : 21,479.66 = 8,491.42 : x
  2. Step 2: Convert to fraction form
    15,564.86/21,479.66 = 8,491.42/x
  3. Step 3: Cross multiply
    15,564.86x = 21,479.66 × 8,491.42
  4. Step 4: Simplify right side
    15,564.86x = 182,392,814.52
  5. Step 5: Solve for x
    x = 182,392,814.52/15,564.86
  6. Step 6: Final answer
    x = 11,718.24

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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.