Home / 28,091.08-38,766.02-15,515.80

Finding the Fourth Proportional to 28,091.08, 38,766.02 and 15,515.80

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Solution

The fourth proportional to 28,091.08, 38,766.02 and 15,515.80 is: 21,411.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,091.08 : 38,766.02 = 15,515.80 : x
  2. Step 2: Convert to fraction form
    28,091.08/38,766.02 = 15,515.80/x
  3. Step 3: Cross multiply
    28,091.08x = 38,766.02 × 15,515.80
  4. Step 4: Simplify right side
    28,091.08x = 601,485,813.12
  5. Step 5: Solve for x
    x = 601,485,813.12/28,091.08
  6. Step 6: Final answer
    x = 21,411.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.