Home / 12,518.10-18,768.60-5,120.34

Finding the Fourth Proportional to 12,518.10, 18,768.60 and 5,120.34

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Solution

The fourth proportional to 12,518.10, 18,768.60 and 5,120.34 is: 7,677.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,518.10 : 18,768.60 = 5,120.34 : x
  2. Step 2: Convert to fraction form
    12,518.10/18,768.60 = 5,120.34/x
  3. Step 3: Cross multiply
    12,518.10x = 18,768.60 × 5,120.34
  4. Step 4: Simplify right side
    12,518.10x = 96,101,613.32
  5. Step 5: Solve for x
    x = 96,101,613.32/12,518.10
  6. Step 6: Final answer
    x = 7,677.01

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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.