Home / 13,639.17-18,820.80-7,671.36

Finding the Fourth Proportional to 13,639.17, 18,820.80 and 7,671.36

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Solution

The fourth proportional to 13,639.17, 18,820.80 and 7,671.36 is: 10,585.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.17 : 18,820.80 = 7,671.36 : x
  2. Step 2: Convert to fraction form
    13,639.17/18,820.80 = 7,671.36/x
  3. Step 3: Cross multiply
    13,639.17x = 18,820.80 × 7,671.36
  4. Step 4: Simplify right side
    13,639.17x = 144,381,132.29
  5. Step 5: Solve for x
    x = 144,381,132.29/13,639.17
  6. Step 6: Final answer
    x = 10,585.77

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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.