Home / 12,170.79-18,242.69-5,590.35

Finding the Fourth Proportional to 12,170.79, 18,242.69 and 5,590.35

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Solution

The fourth proportional to 12,170.79, 18,242.69 and 5,590.35 is: 8,379.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,170.79 : 18,242.69 = 5,590.35 : x
  2. Step 2: Convert to fraction form
    12,170.79/18,242.69 = 5,590.35/x
  3. Step 3: Cross multiply
    12,170.79x = 18,242.69 × 5,590.35
  4. Step 4: Simplify right side
    12,170.79x = 101,982,994.09
  5. Step 5: Solve for x
    x = 101,982,994.09/12,170.79
  6. Step 6: Final answer
    x = 8,379.32

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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.