Home / 18,985.41-28,480.40-7,899.60

Finding the Fourth Proportional to 18,985.41, 28,480.40 and 7,899.60

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Solution

The fourth proportional to 18,985.41, 28,480.40 and 7,899.60 is: 11,850.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985.41 : 28,480.40 = 7,899.60 : x
  2. Step 2: Convert to fraction form
    18,985.41/28,480.40 = 7,899.60/x
  3. Step 3: Cross multiply
    18,985.41x = 28,480.40 × 7,899.60
  4. Step 4: Simplify right side
    18,985.41x = 224,983,728.34
  5. Step 5: Solve for x
    x = 224,983,728.34/18,985.41
  6. Step 6: Final answer
    x = 11,850.35

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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.