Home / 21,455.32-29,610.09-11,898.20

Finding the Fourth Proportional to 21,455.32, 29,610.09 and 11,898.20

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Solution

The fourth proportional to 21,455.32, 29,610.09 and 11,898.20 is: 16,420.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,455.32 : 29,610.09 = 11,898.20 : x
  2. Step 2: Convert to fraction form
    21,455.32/29,610.09 = 11,898.20/x
  3. Step 3: Cross multiply
    21,455.32x = 29,610.09 × 11,898.20
  4. Step 4: Simplify right side
    21,455.32x = 352,306,772.84
  5. Step 5: Solve for x
    x = 352,306,772.84/21,455.32
  6. Step 6: Final answer
    x = 16,420.49

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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.