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Finding the Fourth Proportional to 28,584, 42,878.97 and 7,807.50

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Solution

The fourth proportional to 28,584, 42,878.97 and 7,807.50 is: 11,712.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,584 : 42,878.97 = 7,807.50 : x
  2. Step 2: Convert to fraction form
    28,584/42,878.97 = 7,807.50/x
  3. Step 3: Cross multiply
    28,584x = 42,878.97 × 7,807.50
  4. Step 4: Simplify right side
    28,584x = 334,777,558.28
  5. Step 5: Solve for x
    x = 334,777,558.28/28,584
  6. Step 6: Final answer
    x = 11,712.06

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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.