Home / 15,455.28-21,328.56-8,382

Finding the Fourth Proportional to 15,455.28, 21,328.56 and 8,382

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Solution

The fourth proportional to 15,455.28, 21,328.56 and 8,382 is: 11,567.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.28 : 21,328.56 = 8,382 : x
  2. Step 2: Convert to fraction form
    15,455.28/21,328.56 = 8,382/x
  3. Step 3: Cross multiply
    15,455.28x = 21,328.56 × 8,382
  4. Step 4: Simplify right side
    15,455.28x = 178,775,989.92
  5. Step 5: Solve for x
    x = 178,775,989.92/15,455.28
  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.