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Finding the Fourth Proportional to 21,555.71, 29,737.69 and 12,352.39

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Solution

The fourth proportional to 21,555.71, 29,737.69 and 12,352.39 is: 17,041.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.71 : 29,737.69 = 12,352.39 : x
  2. Step 2: Convert to fraction form
    21,555.71/29,737.69 = 12,352.39/x
  3. Step 3: Cross multiply
    21,555.71x = 29,737.69 × 12,352.39
  4. Step 4: Simplify right side
    21,555.71x = 367,331,544.58
  5. Step 5: Solve for x
    x = 367,331,544.58/21,555.71
  6. Step 6: Final answer
    x = 17,041.03

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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.