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Finding the Fourth Proportional to 18,973.31, 28,421.87 and 9,456.93

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Solution

The fourth proportional to 18,973.31, 28,421.87 and 9,456.93 is: 14,166.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.31 : 28,421.87 = 9,456.93 : x
  2. Step 2: Convert to fraction form
    18,973.31/28,421.87 = 9,456.93/x
  3. Step 3: Cross multiply
    18,973.31x = 28,421.87 × 9,456.93
  4. Step 4: Simplify right side
    18,973.31x = 268,783,587.77
  5. Step 5: Solve for x
    x = 268,783,587.77/18,973.31
  6. Step 6: Final answer
    x = 14,166.41

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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.