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Finding the Fourth Proportional to 28,648.77, 42,973.16 and 8,927.31

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Solution

The fourth proportional to 28,648.77, 42,973.16 and 8,927.31 is: 13,390.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,648.77 : 42,973.16 = 8,927.31 : x
  2. Step 2: Convert to fraction form
    28,648.77/42,973.16 = 8,927.31/x
  3. Step 3: Cross multiply
    28,648.77x = 42,973.16 × 8,927.31
  4. Step 4: Simplify right side
    28,648.77x = 383,634,676.36
  5. Step 5: Solve for x
    x = 383,634,676.36/28,648.77
  6. Step 6: Final answer
    x = 13,390.97

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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.