Home / 21,270.17-29,359.29-12,319.87

Finding the Fourth Proportional to 21,270.17, 29,359.29 and 12,319.87

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Solution

The fourth proportional to 21,270.17, 29,359.29 and 12,319.87 is: 17,005.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.17 : 29,359.29 = 12,319.87 : x
  2. Step 2: Convert to fraction form
    21,270.17/29,359.29 = 12,319.87/x
  3. Step 3: Cross multiply
    21,270.17x = 29,359.29 × 12,319.87
  4. Step 4: Simplify right side
    21,270.17x = 361,702,636.09
  5. Step 5: Solve for x
    x = 361,702,636.09/21,270.17
  6. Step 6: Final answer
    x = 17,005.16

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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.