Home / 12,513.68-18,771.43-5,118.28

Finding the Fourth Proportional to 12,513.68, 18,771.43 and 5,118.28

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Solution

The fourth proportional to 12,513.68, 18,771.43 and 5,118.28 is: 7,677.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,513.68 : 18,771.43 = 5,118.28 : x
  2. Step 2: Convert to fraction form
    12,513.68/18,771.43 = 5,118.28/x
  3. Step 3: Cross multiply
    12,513.68x = 18,771.43 × 5,118.28
  4. Step 4: Simplify right side
    12,513.68x = 96,077,434.74
  5. Step 5: Solve for x
    x = 96,077,434.74/12,513.68
  6. Step 6: Final answer
    x = 7,677.79

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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.