Home / 15,137.30-20,889.77-8,423.21

Finding the Fourth Proportional to 15,137.30, 20,889.77 and 8,423.21

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Solution

The fourth proportional to 15,137.30, 20,889.77 and 8,423.21 is: 11,624.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,137.30 : 20,889.77 = 8,423.21 : x
  2. Step 2: Convert to fraction form
    15,137.30/20,889.77 = 8,423.21/x
  3. Step 3: Cross multiply
    15,137.30x = 20,889.77 × 8,423.21
  4. Step 4: Simplify right side
    15,137.30x = 175,958,929.67
  5. Step 5: Solve for x
    x = 175,958,929.67/15,137.30
  6. Step 6: Final answer
    x = 11,624.19

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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.