Home / 28,721.42-39,639.12-16,146.17

Finding the Fourth Proportional to 28,721.42, 39,639.12 and 16,146.17

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Solution

The fourth proportional to 28,721.42, 39,639.12 and 16,146.17 is: 22,283.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,721.42 : 39,639.12 = 16,146.17 : x
  2. Step 2: Convert to fraction form
    28,721.42/39,639.12 = 16,146.17/x
  3. Step 3: Cross multiply
    28,721.42x = 39,639.12 × 16,146.17
  4. Step 4: Simplify right side
    28,721.42x = 640,019,970.17
  5. Step 5: Solve for x
    x = 640,019,970.17/28,721.42
  6. Step 6: Final answer
    x = 22,283.72

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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.