Home / 13,639.97-18,823.28-7,671.59

Finding the Fourth Proportional to 13,639.97, 18,823.28 and 7,671.59

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Solution

The fourth proportional to 13,639.97, 18,823.28 and 7,671.59 is: 10,586.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.97 : 18,823.28 = 7,671.59 : x
  2. Step 2: Convert to fraction form
    13,639.97/18,823.28 = 7,671.59/x
  3. Step 3: Cross multiply
    13,639.97x = 18,823.28 × 7,671.59
  4. Step 4: Simplify right side
    13,639.97x = 144,404,354.14
  5. Step 5: Solve for x
    x = 144,404,354.14/13,639.97
  6. Step 6: Final answer
    x = 10,586.86

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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.