Home / 38,272.80-57,409.20-11,985.60

Finding the Fourth Proportional to 38,272.80, 57,409.20 and 11,985.60

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Solution

The fourth proportional to 38,272.80, 57,409.20 and 11,985.60 is: 17,978.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,272.80 : 57,409.20 = 11,985.60 : x
  2. Step 2: Convert to fraction form
    38,272.80/57,409.20 = 11,985.60/x
  3. Step 3: Cross multiply
    38,272.80x = 57,409.20 × 11,985.60
  4. Step 4: Simplify right side
    38,272.80x = 688,083,707.52
  5. Step 5: Solve for x
    x = 688,083,707.52/38,272.80
  6. Step 6: Final answer
    x = 17,978.40

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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.