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Finding the Fourth Proportional to 18,480.80, 25,486.40 and 12,521.12

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Solution

The fourth proportional to 18,480.80, 25,486.40 and 12,521.12 is: 17,267.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,480.80 : 25,486.40 = 12,521.12 : x
  2. Step 2: Convert to fraction form
    18,480.80/25,486.40 = 12,521.12/x
  3. Step 3: Cross multiply
    18,480.80x = 25,486.40 × 12,521.12
  4. Step 4: Simplify right side
    18,480.80x = 319,118,272.77
  5. Step 5: Solve for x
    x = 319,118,272.77/18,480.80
  6. Step 6: Final answer
    x = 17,267.56

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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.