Home / 8,418-12,617.36-4,721.92

Finding the Fourth Proportional to 8,418, 12,617.36 and 4,721.92

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Solution

The fourth proportional to 8,418, 12,617.36 and 4,721.92 is: 7,077.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,418 : 12,617.36 = 4,721.92 : x
  2. Step 2: Convert to fraction form
    8,418/12,617.36 = 4,721.92/x
  3. Step 3: Cross multiply
    8,418x = 12,617.36 × 4,721.92
  4. Step 4: Simplify right side
    8,418x = 59,578,164.53
  5. Step 5: Solve for x
    x = 59,578,164.53/8,418
  6. Step 6: Final answer
    x = 7,077.47

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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.