Home / 15,889.21-21,927.11-8,815.62

Finding the Fourth Proportional to 15,889.21, 21,927.11 and 8,815.62

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Solution

The fourth proportional to 15,889.21, 21,927.11 and 8,815.62 is: 12,165.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,889.21 : 21,927.11 = 8,815.62 : x
  2. Step 2: Convert to fraction form
    15,889.21/21,927.11 = 8,815.62/x
  3. Step 3: Cross multiply
    15,889.21x = 21,927.11 × 8,815.62
  4. Step 4: Simplify right side
    15,889.21x = 193,300,981.86
  5. Step 5: Solve for x
    x = 193,300,981.86/15,889.21
  6. Step 6: Final answer
    x = 12,165.55

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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.