Home / 12,121.48-18,165.64-9,157.50

Finding the Fourth Proportional to 12,121.48, 18,165.64 and 9,157.50

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Solution

The fourth proportional to 12,121.48, 18,165.64 and 9,157.50 is: 13,723.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.48 : 18,165.64 = 9,157.50 : x
  2. Step 2: Convert to fraction form
    12,121.48/18,165.64 = 9,157.50/x
  3. Step 3: Cross multiply
    12,121.48x = 18,165.64 × 9,157.50
  4. Step 4: Simplify right side
    12,121.48x = 166,351,848.30
  5. Step 5: Solve for x
    x = 166,351,848.30/12,121.48
  6. Step 6: Final answer
    x = 13,723.72

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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.