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Finding the Fourth Proportional to 28,096.88, 38,775.51 and 15,521.63

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Solution

The fourth proportional to 28,096.88, 38,775.51 and 15,521.63 is: 21,420.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,096.88 : 38,775.51 = 15,521.63 : x
  2. Step 2: Convert to fraction form
    28,096.88/38,775.51 = 15,521.63/x
  3. Step 3: Cross multiply
    28,096.88x = 38,775.51 × 15,521.63
  4. Step 4: Simplify right side
    28,096.88x = 601,858,925.40
  5. Step 5: Solve for x
    x = 601,858,925.40/28,096.88
  6. Step 6: Final answer
    x = 21,420.85

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Half scale
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Double scale
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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.