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Finding the Fourth Proportional to 31,012.20, 43,475.40 and 31,012.20

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Solution

The fourth proportional to 31,012.20, 43,475.40 and 31,012.20 is: 43,475.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,012.20 : 43,475.40 = 31,012.20 : x
  2. Step 2: Convert to fraction form
    31,012.20/43,475.40 = 31,012.20/x
  3. Step 3: Cross multiply
    31,012.20x = 43,475.40 × 31,012.20
  4. Step 4: Simplify right side
    31,012.20x = 1,348,267,799.88
  5. Step 5: Solve for x
    x = 1,348,267,799.88/31,012.20
  6. Step 6: Final answer
    x = 43,475.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.