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Finding the Fourth Proportional to 28,521.79, 42,787.55 and 8,796.67

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Solution

The fourth proportional to 28,521.79, 42,787.55 and 8,796.67 is: 13,196.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,521.79 : 42,787.55 = 8,796.67 : x
  2. Step 2: Convert to fraction form
    28,521.79/42,787.55 = 8,796.67/x
  3. Step 3: Cross multiply
    28,521.79x = 42,787.55 × 8,796.67
  4. Step 4: Simplify right side
    28,521.79x = 376,387,957.46
  5. Step 5: Solve for x
    x = 376,387,957.46/28,521.79
  6. Step 6: Final answer
    x = 13,196.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.