Home / 15,455.71-21,328.86-8,382.12

Finding the Fourth Proportional to 15,455.71, 21,328.86 and 8,382.12

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Solution

The fourth proportional to 15,455.71, 21,328.86 and 8,382.12 is: 11,567.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.71 : 21,328.86 = 8,382.12 : x
  2. Step 2: Convert to fraction form
    15,455.71/21,328.86 = 8,382.12/x
  3. Step 3: Cross multiply
    15,455.71x = 21,328.86 × 8,382.12
  4. Step 4: Simplify right side
    15,455.71x = 178,781,063.98
  5. Step 5: Solve for x
    x = 178,781,063.98/15,455.71
  6. Step 6: Final answer
    x = 11,567.31

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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.