Home / 38,280.80-57,421.20-11,993.60

Finding the Fourth Proportional to 38,280.80, 57,421.20 and 11,993.60

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Solution

The fourth proportional to 38,280.80, 57,421.20 and 11,993.60 is: 17,990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,280.80 : 57,421.20 = 11,993.60 : x
  2. Step 2: Convert to fraction form
    38,280.80/57,421.20 = 11,993.60/x
  3. Step 3: Cross multiply
    38,280.80x = 57,421.20 × 11,993.60
  4. Step 4: Simplify right side
    38,280.80x = 688,686,904.32
  5. Step 5: Solve for x
    x = 688,686,904.32/38,280.80
  6. Step 6: Final answer
    x = 17,990.40

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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.