Home / 15,320.80-21,142.16-9,362.44

Finding the Fourth Proportional to 15,320.80, 21,142.16 and 9,362.44

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Solution

The fourth proportional to 15,320.80, 21,142.16 and 9,362.44 is: 12,919.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.80 : 21,142.16 = 9,362.44 : x
  2. Step 2: Convert to fraction form
    15,320.80/21,142.16 = 9,362.44/x
  3. Step 3: Cross multiply
    15,320.80x = 21,142.16 × 9,362.44
  4. Step 4: Simplify right side
    15,320.80x = 197,942,204.47
  5. Step 5: Solve for x
    x = 197,942,204.47/15,320.80
  6. Step 6: Final answer
    x = 12,919.83

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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.