Home / 21,203.12-31,809.28-6,411.66

Finding the Fourth Proportional to 21,203.12, 31,809.28 and 6,411.66

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Solution

The fourth proportional to 21,203.12, 31,809.28 and 6,411.66 is: 9,618.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.12 : 31,809.28 = 6,411.66 : x
  2. Step 2: Convert to fraction form
    21,203.12/31,809.28 = 6,411.66/x
  3. Step 3: Cross multiply
    21,203.12x = 31,809.28 × 6,411.66
  4. Step 4: Simplify right side
    21,203.12x = 203,950,288.20
  5. Step 5: Solve for x
    x = 203,950,288.20/21,203.12
  6. Step 6: Final answer
    x = 9,618.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.