Home / 12,120.48-18,164.15-9,156.50

Finding the Fourth Proportional to 12,120.48, 18,164.15 and 9,156.50

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Solution

The fourth proportional to 12,120.48, 18,164.15 and 9,156.50 is: 13,722.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.48 : 18,164.15 = 9,156.50 : x
  2. Step 2: Convert to fraction form
    12,120.48/18,164.15 = 9,156.50/x
  3. Step 3: Cross multiply
    12,120.48x = 18,164.15 × 9,156.50
  4. Step 4: Simplify right side
    12,120.48x = 166,319,902.87
  5. Step 5: Solve for x
    x = 166,319,902.87/12,120.48
  6. Step 6: Final answer
    x = 13,722.22

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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.