Home / 13,920.72-19,214.28-8,612.52

Finding the Fourth Proportional to 13,920.72, 19,214.28 and 8,612.52

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Solution

The fourth proportional to 13,920.72, 19,214.28 and 8,612.52 is: 11,887.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.72 : 19,214.28 = 8,612.52 : x
  2. Step 2: Convert to fraction form
    13,920.72/19,214.28 = 8,612.52/x
  3. Step 3: Cross multiply
    13,920.72x = 19,214.28 × 8,612.52
  4. Step 4: Simplify right side
    13,920.72x = 165,483,370.79
  5. Step 5: Solve for x
    x = 165,483,370.79/13,920.72
  6. Step 6: Final answer
    x = 11,887.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.