Home / 15,320.45-21,138.50-8,943.39

Finding the Fourth Proportional to 15,320.45, 21,138.50 and 8,943.39

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Solution

The fourth proportional to 15,320.45, 21,138.50 and 8,943.39 is: 12,339.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.45 : 21,138.50 = 8,943.39 : x
  2. Step 2: Convert to fraction form
    15,320.45/21,138.50 = 8,943.39/x
  3. Step 3: Cross multiply
    15,320.45x = 21,138.50 × 8,943.39
  4. Step 4: Simplify right side
    15,320.45x = 189,049,804.80
  5. Step 5: Solve for x
    x = 189,049,804.80/15,320.45
  6. Step 6: Final answer
    x = 12,339.71

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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.