Home / 22,821.45-31,490.49-12,748.65

Finding the Fourth Proportional to 22,821.45, 31,490.49 and 12,748.65

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Solution

The fourth proportional to 22,821.45, 31,490.49 and 12,748.65 is: 17,591.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,821.45 : 31,490.49 = 12,748.65 : x
  2. Step 2: Convert to fraction form
    22,821.45/31,490.49 = 12,748.65/x
  3. Step 3: Cross multiply
    22,821.45x = 31,490.49 × 12,748.65
  4. Step 4: Simplify right side
    22,821.45x = 401,461,014.14
  5. Step 5: Solve for x
    x = 401,461,014.14/22,821.45
  6. Step 6: Final answer
    x = 17,591.39

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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.