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Finding the Fourth Proportional to 12,339.80, 18,477.30 and 9,726.20

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Solution

The fourth proportional to 12,339.80, 18,477.30 and 9,726.20 is: 14,563.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,339.80 : 18,477.30 = 9,726.20 : x
  2. Step 2: Convert to fraction form
    12,339.80/18,477.30 = 9,726.20/x
  3. Step 3: Cross multiply
    12,339.80x = 18,477.30 × 9,726.20
  4. Step 4: Simplify right side
    12,339.80x = 179,713,915.26
  5. Step 5: Solve for x
    x = 179,713,915.26/12,339.80
  6. Step 6: Final answer
    x = 14,563.76

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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.