Home / 15,890.34-21,929.43-8,816.82

Finding the Fourth Proportional to 15,890.34, 21,929.43 and 8,816.82

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Solution

The fourth proportional to 15,890.34, 21,929.43 and 8,816.82 is: 12,167.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.34 : 21,929.43 = 8,816.82 : x
  2. Step 2: Convert to fraction form
    15,890.34/21,929.43 = 8,816.82/x
  3. Step 3: Cross multiply
    15,890.34x = 21,929.43 × 8,816.82
  4. Step 4: Simplify right side
    15,890.34x = 193,347,837.01
  5. Step 5: Solve for x
    x = 193,347,837.01/15,890.34
  6. Step 6: Final answer
    x = 12,167.63

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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.