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Finding the Fourth Proportional to 45,820.84, 68,731.90 and 12,988.84

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Solution

The fourth proportional to 45,820.84, 68,731.90 and 12,988.84 is: 19,483.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,820.84 : 68,731.90 = 12,988.84 : x
  2. Step 2: Convert to fraction form
    45,820.84/68,731.90 = 12,988.84/x
  3. Step 3: Cross multiply
    45,820.84x = 68,731.90 × 12,988.84
  4. Step 4: Simplify right side
    45,820.84x = 892,747,652.00
  5. Step 5: Solve for x
    x = 892,747,652.00/45,820.84
  6. Step 6: Final answer
    x = 19,483.44

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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.