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Finding the Fourth Proportional to 18,648.80, 25,726.65 and 11,090.89

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Solution

The fourth proportional to 18,648.80, 25,726.65 and 11,090.89 is: 15,300.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,648.80 : 25,726.65 = 11,090.89 : x
  2. Step 2: Convert to fraction form
    18,648.80/25,726.65 = 11,090.89/x
  3. Step 3: Cross multiply
    18,648.80x = 25,726.65 × 11,090.89
  4. Step 4: Simplify right side
    18,648.80x = 285,331,261.13
  5. Step 5: Solve for x
    x = 285,331,261.13/18,648.80
  6. Step 6: Final answer
    x = 15,300.25

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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.