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Finding the Fourth Proportional to 30,785.70, 43,012.50 and 30,785.70

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Solution

The fourth proportional to 30,785.70, 43,012.50 and 30,785.70 is: 43,012.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,785.70 : 43,012.50 = 30,785.70 : x
  2. Step 2: Convert to fraction form
    30,785.70/43,012.50 = 30,785.70/x
  3. Step 3: Cross multiply
    30,785.70x = 43,012.50 × 30,785.70
  4. Step 4: Simplify right side
    30,785.70x = 1,324,169,921.25
  5. Step 5: Solve for x
    x = 1,324,169,921.25/30,785.70
  6. Step 6: Final answer
    x = 43,012.50

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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.