Home / 30,688.40-46,032.60-20,190.80

Finding the Fourth Proportional to 30,688.40, 46,032.60 and 20,190.80

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Solution

The fourth proportional to 30,688.40, 46,032.60 and 20,190.80 is: 30,286.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,688.40 : 46,032.60 = 20,190.80 : x
  2. Step 2: Convert to fraction form
    30,688.40/46,032.60 = 20,190.80/x
  3. Step 3: Cross multiply
    30,688.40x = 46,032.60 × 20,190.80
  4. Step 4: Simplify right side
    30,688.40x = 929,435,020.08
  5. Step 5: Solve for x
    x = 929,435,020.08/30,688.40
  6. Step 6: Final answer
    x = 30,286.20

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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.