Home / 15,564.80-21,479.28-8,491.06

Finding the Fourth Proportional to 15,564.80, 21,479.28 and 8,491.06

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Solution

The fourth proportional to 15,564.80, 21,479.28 and 8,491.06 is: 11,717.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.80 : 21,479.28 = 8,491.06 : x
  2. Step 2: Convert to fraction form
    15,564.80/21,479.28 = 8,491.06/x
  3. Step 3: Cross multiply
    15,564.80x = 21,479.28 × 8,491.06
  4. Step 4: Simplify right side
    15,564.80x = 182,381,855.24
  5. Step 5: Solve for x
    x = 182,381,855.24/15,564.80
  6. Step 6: Final answer
    x = 11,717.58

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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.