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Finding the Fourth Proportional to 21,866.58, 30,175.01 and 12,916.95

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Solution

The fourth proportional to 21,866.58, 30,175.01 and 12,916.95 is: 17,824.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,866.58 : 30,175.01 = 12,916.95 : x
  2. Step 2: Convert to fraction form
    21,866.58/30,175.01 = 12,916.95/x
  3. Step 3: Cross multiply
    21,866.58x = 30,175.01 × 12,916.95
  4. Step 4: Simplify right side
    21,866.58x = 389,769,106.27
  5. Step 5: Solve for x
    x = 389,769,106.27/21,866.58
  6. Step 6: Final answer
    x = 17,824.88

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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.