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Finding the Fourth Proportional to 40,492.91, 60,740.80 and 10,911.47

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Solution

The fourth proportional to 40,492.91, 60,740.80 and 10,911.47 is: 16,367.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,492.91 : 60,740.80 = 10,911.47 : x
  2. Step 2: Convert to fraction form
    40,492.91/60,740.80 = 10,911.47/x
  3. Step 3: Cross multiply
    40,492.91x = 60,740.80 × 10,911.47
  4. Step 4: Simplify right side
    40,492.91x = 662,771,085.99
  5. Step 5: Solve for x
    x = 662,771,085.99/40,492.91
  6. Step 6: Final answer
    x = 16,367.58

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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.