Home / 28,209.02-42,316.20-7,945.72

Finding the Fourth Proportional to 28,209.02, 42,316.20 and 7,945.72

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Solution

The fourth proportional to 28,209.02, 42,316.20 and 7,945.72 is: 11,919.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,209.02 : 42,316.20 = 7,945.72 : x
  2. Step 2: Convert to fraction form
    28,209.02/42,316.20 = 7,945.72/x
  3. Step 3: Cross multiply
    28,209.02x = 42,316.20 × 7,945.72
  4. Step 4: Simplify right side
    28,209.02x = 336,232,570.87
  5. Step 5: Solve for x
    x = 336,232,570.87/28,209.02
  6. Step 6: Final answer
    x = 11,919.33

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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.