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Finding the Fourth Proportional to 51,929.90, 77,894.81 and 12,487.00

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Solution

The fourth proportional to 51,929.90, 77,894.81 and 12,487.00 is: 18,730.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,929.90 : 77,894.81 = 12,487.00 : x
  2. Step 2: Convert to fraction form
    51,929.90/77,894.81 = 12,487.00/x
  3. Step 3: Cross multiply
    51,929.90x = 77,894.81 × 12,487.00
  4. Step 4: Simplify right side
    51,929.90x = 972,672,040.56
  5. Step 5: Solve for x
    x = 972,672,040.56/51,929.90
  6. Step 6: Final answer
    x = 18,730.48

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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.