Home / 15,890.69-21,929.15-8,817.16

Finding the Fourth Proportional to 15,890.69, 21,929.15 and 8,817.16

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Solution

The fourth proportional to 15,890.69, 21,929.15 and 8,817.16 is: 12,167.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.69 : 21,929.15 = 8,817.16 : x
  2. Step 2: Convert to fraction form
    15,890.69/21,929.15 = 8,817.16/x
  3. Step 3: Cross multiply
    15,890.69x = 21,929.15 × 8,817.16
  4. Step 4: Simplify right side
    15,890.69x = 193,352,846.26
  5. Step 5: Solve for x
    x = 193,352,846.26/15,890.69
  6. Step 6: Final answer
    x = 12,167.68

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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.