Home / 12,502.35-18,720.72-8,106.48

Finding the Fourth Proportional to 12,502.35, 18,720.72 and 8,106.48

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Solution

The fourth proportional to 12,502.35, 18,720.72 and 8,106.48 is: 12,138.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,502.35 : 18,720.72 = 8,106.48 : x
  2. Step 2: Convert to fraction form
    12,502.35/18,720.72 = 8,106.48/x
  3. Step 3: Cross multiply
    12,502.35x = 18,720.72 × 8,106.48
  4. Step 4: Simplify right side
    12,502.35x = 151,759,142.27
  5. Step 5: Solve for x
    x = 151,759,142.27/12,502.35
  6. Step 6: Final answer
    x = 12,138.45

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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.