Home / 21,270.18-29,359.28-12,319.88

Finding the Fourth Proportional to 21,270.18, 29,359.28 and 12,319.88

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Solution

The fourth proportional to 21,270.18, 29,359.28 and 12,319.88 is: 17,005.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.18 : 29,359.28 = 12,319.88 : x
  2. Step 2: Convert to fraction form
    21,270.18/29,359.28 = 12,319.88/x
  3. Step 3: Cross multiply
    21,270.18x = 29,359.28 × 12,319.88
  4. Step 4: Simplify right side
    21,270.18x = 361,702,806.49
  5. Step 5: Solve for x
    x = 361,702,806.49/21,270.18
  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.