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Finding the Fourth Proportional to 40,999.40, 61,490.70 and 11,409.80

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Solution

The fourth proportional to 40,999.40, 61,490.70 and 11,409.80 is: 17,112.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,999.40 : 61,490.70 = 11,409.80 : x
  2. Step 2: Convert to fraction form
    40,999.40/61,490.70 = 11,409.80/x
  3. Step 3: Cross multiply
    40,999.40x = 61,490.70 × 11,409.80
  4. Step 4: Simplify right side
    40,999.40x = 701,596,588.86
  5. Step 5: Solve for x
    x = 701,596,588.86/40,999.40
  6. Step 6: Final answer
    x = 17,112.36

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1.5x scale

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.