Home / 28,706.68-39,651.96-21,951.28

Finding the Fourth Proportional to 28,706.68, 39,651.96 and 21,951.28

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Solution

The fourth proportional to 28,706.68, 39,651.96 and 21,951.28 is: 30,320.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,706.68 : 39,651.96 = 21,951.28 : x
  2. Step 2: Convert to fraction form
    28,706.68/39,651.96 = 21,951.28/x
  3. Step 3: Cross multiply
    28,706.68x = 39,651.96 × 21,951.28
  4. Step 4: Simplify right side
    28,706.68x = 870,411,276.51
  5. Step 5: Solve for x
    x = 870,411,276.51/28,706.68
  6. Step 6: Final answer
    x = 30,320.86

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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.