Home / 15,564.60-21,479.12-8,491.02

Finding the Fourth Proportional to 15,564.60, 21,479.12 and 8,491.02

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Solution

The fourth proportional to 15,564.60, 21,479.12 and 8,491.02 is: 11,717.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.60 : 21,479.12 = 8,491.02 : x
  2. Step 2: Convert to fraction form
    15,564.60/21,479.12 = 8,491.02/x
  3. Step 3: Cross multiply
    15,564.60x = 21,479.12 × 8,491.02
  4. Step 4: Simplify right side
    15,564.60x = 182,379,637.50
  5. Step 5: Solve for x
    x = 182,379,637.50/15,564.60
  6. Step 6: Final answer
    x = 11,717.59

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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.