Home / 15,564.87-21,479.45-8,491.23

Finding the Fourth Proportional to 15,564.87, 21,479.45 and 8,491.23

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Solution

The fourth proportional to 15,564.87, 21,479.45 and 8,491.23 is: 11,717.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.87 : 21,479.45 = 8,491.23 : x
  2. Step 2: Convert to fraction form
    15,564.87/21,479.45 = 8,491.23/x
  3. Step 3: Cross multiply
    15,564.87x = 21,479.45 × 8,491.23
  4. Step 4: Simplify right side
    15,564.87x = 182,386,907.77
  5. Step 5: Solve for x
    x = 182,386,907.77/15,564.87
  6. Step 6: Final answer
    x = 11,717.86

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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.