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Finding the Fourth Proportional to 22,390.98, 30,897.63 and 12,960.06

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Solution

The fourth proportional to 22,390.98, 30,897.63 and 12,960.06 is: 17,883.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,390.98 : 30,897.63 = 12,960.06 : x
  2. Step 2: Convert to fraction form
    22,390.98/30,897.63 = 12,960.06/x
  3. Step 3: Cross multiply
    22,390.98x = 30,897.63 × 12,960.06
  4. Step 4: Simplify right side
    22,390.98x = 400,435,138.66
  5. Step 5: Solve for x
    x = 400,435,138.66/22,390.98
  6. Step 6: Final answer
    x = 17,883.77

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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.