Home / 12,117.36-18,176.40-10,171.20

Finding the Fourth Proportional to 12,117.36, 18,176.40 and 10,171.20

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Solution

The fourth proportional to 12,117.36, 18,176.40 and 10,171.20 is: 15,257.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,117.36 : 18,176.40 = 10,171.20 : x
  2. Step 2: Convert to fraction form
    12,117.36/18,176.40 = 10,171.20/x
  3. Step 3: Cross multiply
    12,117.36x = 18,176.40 × 10,171.20
  4. Step 4: Simplify right side
    12,117.36x = 184,875,799.68
  5. Step 5: Solve for x
    x = 184,875,799.68/12,117.36
  6. Step 6: Final answer
    x = 15,257.10

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Similar ratio
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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.