Home / 12,721.34-17,551.86-8,245.28

Finding the Fourth Proportional to 12,721.34, 17,551.86 and 8,245.28

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Solution

The fourth proportional to 12,721.34, 17,551.86 and 8,245.28 is: 11,376.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.34 : 17,551.86 = 8,245.28 : x
  2. Step 2: Convert to fraction form
    12,721.34/17,551.86 = 8,245.28/x
  3. Step 3: Cross multiply
    12,721.34x = 17,551.86 × 8,245.28
  4. Step 4: Simplify right side
    12,721.34x = 144,720,000.22
  5. Step 5: Solve for x
    x = 144,720,000.22/12,721.34
  6. Step 6: Final answer
    x = 11,376.16

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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.