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Finding the Fourth Proportional to 31,384.86, 43,318.57 and 17,963.86

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Solution

The fourth proportional to 31,384.86, 43,318.57 and 17,963.86 is: 24,794.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,384.86 : 43,318.57 = 17,963.86 : x
  2. Step 2: Convert to fraction form
    31,384.86/43,318.57 = 17,963.86/x
  3. Step 3: Cross multiply
    31,384.86x = 43,318.57 × 17,963.86
  4. Step 4: Simplify right side
    31,384.86x = 778,168,510.29
  5. Step 5: Solve for x
    x = 778,168,510.29/31,384.86
  6. Step 6: Final answer
    x = 24,794.40

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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.