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Finding the Fourth Proportional to 28,521.93, 42,784.11 and 8,800.05

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Solution

The fourth proportional to 28,521.93, 42,784.11 and 8,800.05 is: 13,200.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,521.93 : 42,784.11 = 8,800.05 : x
  2. Step 2: Convert to fraction form
    28,521.93/42,784.11 = 8,800.05/x
  3. Step 3: Cross multiply
    28,521.93x = 42,784.11 × 8,800.05
  4. Step 4: Simplify right side
    28,521.93x = 376,502,307.21
  5. Step 5: Solve for x
    x = 376,502,307.21/28,521.93
  6. Step 6: Final answer
    x = 13,200.45

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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.