Home / 15,320.64-21,149.82-11,910

Finding the Fourth Proportional to 15,320.64, 21,149.82 and 11,910

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Solution

The fourth proportional to 15,320.64, 21,149.82 and 11,910 is: 16,441.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.64 : 21,149.82 = 11,910 : x
  2. Step 2: Convert to fraction form
    15,320.64/21,149.82 = 11,910/x
  3. Step 3: Cross multiply
    15,320.64x = 21,149.82 × 11,910
  4. Step 4: Simplify right side
    15,320.64x = 251,894,356.20
  5. Step 5: Solve for x
    x = 251,894,356.20/15,320.64
  6. Step 6: Final answer
    x = 16,441.50

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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.