Home / 28,272.16-38,951.40-21,876.76

Finding the Fourth Proportional to 28,272.16, 38,951.40 and 21,876.76

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Solution

The fourth proportional to 28,272.16, 38,951.40 and 21,876.76 is: 30,140.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,272.16 : 38,951.40 = 21,876.76 : x
  2. Step 2: Convert to fraction form
    28,272.16/38,951.40 = 21,876.76/x
  3. Step 3: Cross multiply
    28,272.16x = 38,951.40 × 21,876.76
  4. Step 4: Simplify right side
    28,272.16x = 852,130,429.46
  5. Step 5: Solve for x
    x = 852,130,429.46/28,272.16
  6. Step 6: Final answer
    x = 30,140.27

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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.