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Finding the Fourth Proportional to 16,686.30, 25,009.20 and 11,421.30

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Solution

The fourth proportional to 16,686.30, 25,009.20 and 11,421.30 is: 17,118.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,686.30 : 25,009.20 = 11,421.30 : x
  2. Step 2: Convert to fraction form
    16,686.30/25,009.20 = 11,421.30/x
  3. Step 3: Cross multiply
    16,686.30x = 25,009.20 × 11,421.30
  4. Step 4: Simplify right side
    16,686.30x = 285,637,575.96
  5. Step 5: Solve for x
    x = 285,637,575.96/16,686.30
  6. Step 6: Final answer
    x = 17,118.09

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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.