Home / 30,631.40-45,947.10-20,133.80

Finding the Fourth Proportional to 30,631.40, 45,947.10 and 20,133.80

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Solution

The fourth proportional to 30,631.40, 45,947.10 and 20,133.80 is: 30,200.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,631.40 : 45,947.10 = 20,133.80 : x
  2. Step 2: Convert to fraction form
    30,631.40/45,947.10 = 20,133.80/x
  3. Step 3: Cross multiply
    30,631.40x = 45,947.10 × 20,133.80
  4. Step 4: Simplify right side
    30,631.40x = 925,089,721.98
  5. Step 5: Solve for x
    x = 925,089,721.98/30,631.40
  6. Step 6: Final answer
    x = 30,200.70

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Similar ratio
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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.