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Finding the Fourth Proportional to 15,209.01, 20,987.83 and 8,494.51

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Solution

The fourth proportional to 15,209.01, 20,987.83 and 8,494.51 is: 11,722.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,209.01 : 20,987.83 = 8,494.51 : x
  2. Step 2: Convert to fraction form
    15,209.01/20,987.83 = 8,494.51/x
  3. Step 3: Cross multiply
    15,209.01x = 20,987.83 × 8,494.51
  4. Step 4: Simplify right side
    15,209.01x = 178,281,331.81
  5. Step 5: Solve for x
    x = 178,281,331.81/15,209.01
  6. Step 6: Final answer
    x = 11,722.09

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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.