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Finding the Fourth Proportional to 44,343.80, 66,515.70 and 21,015.80

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Solution

The fourth proportional to 44,343.80, 66,515.70 and 21,015.80 is: 31,523.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,343.80 : 66,515.70 = 21,015.80 : x
  2. Step 2: Convert to fraction form
    44,343.80/66,515.70 = 21,015.80/x
  3. Step 3: Cross multiply
    44,343.80x = 66,515.70 × 21,015.80
  4. Step 4: Simplify right side
    44,343.80x = 1,397,880,648.06
  5. Step 5: Solve for x
    x = 1,397,880,648.06/44,343.80
  6. Step 6: Final answer
    x = 31,523.70

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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.