Home / 13,639.77-18,822.69-7,671.44

Finding the Fourth Proportional to 13,639.77, 18,822.69 and 7,671.44

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Solution

The fourth proportional to 13,639.77, 18,822.69 and 7,671.44 is: 10,586.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.77 : 18,822.69 = 7,671.44 : x
  2. Step 2: Convert to fraction form
    13,639.77/18,822.69 = 7,671.44/x
  3. Step 3: Cross multiply
    13,639.77x = 18,822.69 × 7,671.44
  4. Step 4: Simplify right side
    13,639.77x = 144,397,042.86
  5. Step 5: Solve for x
    x = 144,397,042.86/13,639.77
  6. Step 6: Final answer
    x = 10,586.47

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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.