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Finding the Fourth Proportional to 30,487.91, 45,693.74 and 14,689.98

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Solution

The fourth proportional to 30,487.91, 45,693.74 and 14,689.98 is: 22,016.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,487.91 : 45,693.74 = 14,689.98 : x
  2. Step 2: Convert to fraction form
    30,487.91/45,693.74 = 14,689.98/x
  3. Step 3: Cross multiply
    30,487.91x = 45,693.74 × 14,689.98
  4. Step 4: Simplify right side
    30,487.91x = 671,240,126.73
  5. Step 5: Solve for x
    x = 671,240,126.73/30,487.91
  6. Step 6: Final answer
    x = 22,016.60

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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.