Home / 38,280.20-57,422.10-11,985.80

Finding the Fourth Proportional to 38,280.20, 57,422.10 and 11,985.80

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Solution

The fourth proportional to 38,280.20, 57,422.10 and 11,985.80 is: 17,979.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,280.20 : 57,422.10 = 11,985.80 : x
  2. Step 2: Convert to fraction form
    38,280.20/57,422.10 = 11,985.80/x
  3. Step 3: Cross multiply
    38,280.20x = 57,422.10 × 11,985.80
  4. Step 4: Simplify right side
    38,280.20x = 688,249,806.18
  5. Step 5: Solve for x
    x = 688,249,806.18/38,280.20
  6. Step 6: Final answer
    x = 17,979.26

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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.