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Finding the Fourth Proportional to 34,357.80, 47,412.81 and 20,211.60

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Solution

The fourth proportional to 34,357.80, 47,412.81 and 20,211.60 is: 27,891.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,357.80 : 47,412.81 = 20,211.60 : x
  2. Step 2: Convert to fraction form
    34,357.80/47,412.81 = 20,211.60/x
  3. Step 3: Cross multiply
    34,357.80x = 47,412.81 × 20,211.60
  4. Step 4: Simplify right side
    34,357.80x = 958,288,750.60
  5. Step 5: Solve for x
    x = 958,288,750.60/34,357.80
  6. Step 6: Final answer
    x = 27,891.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.