Home / 28,519.02-42,778.80-10,986.30

Finding the Fourth Proportional to 28,519.02, 42,778.80 and 10,986.30

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Solution

The fourth proportional to 28,519.02, 42,778.80 and 10,986.30 is: 16,479.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,519.02 : 42,778.80 = 10,986.30 : x
  2. Step 2: Convert to fraction form
    28,519.02/42,778.80 = 10,986.30/x
  3. Step 3: Cross multiply
    28,519.02x = 42,778.80 × 10,986.30
  4. Step 4: Simplify right side
    28,519.02x = 469,980,730.44
  5. Step 5: Solve for x
    x = 469,980,730.44/28,519.02
  6. Step 6: Final answer
    x = 16,479.55

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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.