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Finding the Fourth Proportional to 30,865.92, 42,594.92 and 16,718.76

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Solution

The fourth proportional to 30,865.92, 42,594.92 and 16,718.76 is: 23,071.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,865.92 : 42,594.92 = 16,718.76 : x
  2. Step 2: Convert to fraction form
    30,865.92/42,594.92 = 16,718.76/x
  3. Step 3: Cross multiply
    30,865.92x = 42,594.92 × 16,718.76
  4. Step 4: Simplify right side
    30,865.92x = 712,134,244.70
  5. Step 5: Solve for x
    x = 712,134,244.70/30,865.92
  6. Step 6: Final answer
    x = 23,071.86

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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.