Home / 21,270.42-29,359.64-12,320.12

Finding the Fourth Proportional to 21,270.42, 29,359.64 and 12,320.12

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Solution

The fourth proportional to 21,270.42, 29,359.64 and 12,320.12 is: 17,005.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.42 : 29,359.64 = 12,320.12 : x
  2. Step 2: Convert to fraction form
    21,270.42/29,359.64 = 12,320.12/x
  3. Step 3: Cross multiply
    21,270.42x = 29,359.64 × 12,320.12
  4. Step 4: Simplify right side
    21,270.42x = 361,714,392.16
  5. Step 5: Solve for x
    x = 361,714,392.16/21,270.42
  6. Step 6: Final answer
    x = 17,005.51

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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.