Home / 40,721.48-61,079.30-12,640.86

Finding the Fourth Proportional to 40,721.48, 61,079.30 and 12,640.86

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Solution

The fourth proportional to 40,721.48, 61,079.30 and 12,640.86 is: 18,960.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,721.48 : 61,079.30 = 12,640.86 : x
  2. Step 2: Convert to fraction form
    40,721.48/61,079.30 = 12,640.86/x
  3. Step 3: Cross multiply
    40,721.48x = 61,079.30 × 12,640.86
  4. Step 4: Simplify right side
    40,721.48x = 772,094,880.20
  5. Step 5: Solve for x
    x = 772,094,880.20/40,721.48
  6. Step 6: Final answer
    x = 18,960.38

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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.