Home / 13,639.64-20,455.36-8,959.46

Finding the Fourth Proportional to 13,639.64, 20,455.36 and 8,959.46

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Solution

The fourth proportional to 13,639.64, 20,455.36 and 8,959.46 is: 13,436.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.64 : 20,455.36 = 8,959.46 : x
  2. Step 2: Convert to fraction form
    13,639.64/20,455.36 = 8,959.46/x
  3. Step 3: Cross multiply
    13,639.64x = 20,455.36 × 8,959.46
  4. Step 4: Simplify right side
    13,639.64x = 183,269,008.45
  5. Step 5: Solve for x
    x = 183,269,008.45/13,639.64
  6. Step 6: Final answer
    x = 13,436.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.