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Finding the Fourth Proportional to 30,865.96, 42,594.88 and 16,718.84

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Solution

The fourth proportional to 30,865.96, 42,594.88 and 16,718.84 is: 23,071.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,865.96 : 42,594.88 = 16,718.84 : x
  2. Step 2: Convert to fraction form
    30,865.96/42,594.88 = 16,718.84/x
  3. Step 3: Cross multiply
    30,865.96x = 42,594.88 × 16,718.84
  4. Step 4: Simplify right side
    30,865.96x = 712,136,686.97
  5. Step 5: Solve for x
    x = 712,136,686.97/30,865.96
  6. Step 6: Final answer
    x = 23,071.91

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.