Home / 15,490.40-21,369.87-9,199.13

Finding the Fourth Proportional to 15,490.40, 21,369.87 and 9,199.13

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Solution

The fourth proportional to 15,490.40, 21,369.87 and 9,199.13 is: 12,690.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.40 : 21,369.87 = 9,199.13 : x
  2. Step 2: Convert to fraction form
    15,490.40/21,369.87 = 9,199.13/x
  3. Step 3: Cross multiply
    15,490.40x = 21,369.87 × 9,199.13
  4. Step 4: Simplify right side
    15,490.40x = 196,584,105.36
  5. Step 5: Solve for x
    x = 196,584,105.36/15,490.40
  6. Step 6: Final answer
    x = 12,690.71

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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.