Home / 8,721.96-12,031.38-5,186.31

Finding the Fourth Proportional to 8,721.96, 12,031.38 and 5,186.31

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Solution

The fourth proportional to 8,721.96, 12,031.38 and 5,186.31 is: 7,154.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.96 : 12,031.38 = 5,186.31 : x
  2. Step 2: Convert to fraction form
    8,721.96/12,031.38 = 5,186.31/x
  3. Step 3: Cross multiply
    8,721.96x = 12,031.38 × 5,186.31
  4. Step 4: Simplify right side
    8,721.96x = 62,398,466.41
  5. Step 5: Solve for x
    x = 62,398,466.41/8,721.96
  6. Step 6: Final answer
    x = 7,154.18

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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.