Home / 13,920.48-19,213.86-8,612.16

Finding the Fourth Proportional to 13,920.48, 19,213.86 and 8,612.16

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Solution

The fourth proportional to 13,920.48, 19,213.86 and 8,612.16 is: 11,887.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.48 : 19,213.86 = 8,612.16 : x
  2. Step 2: Convert to fraction form
    13,920.48/19,213.86 = 8,612.16/x
  3. Step 3: Cross multiply
    13,920.48x = 19,213.86 × 8,612.16
  4. Step 4: Simplify right side
    13,920.48x = 165,472,836.54
  5. Step 5: Solve for x
    x = 165,472,836.54/13,920.48
  6. Step 6: Final answer
    x = 11,887.01

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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.