Home / 15,494.20-21,382.02-8,420.68

Finding the Fourth Proportional to 15,494.20, 21,382.02 and 8,420.68

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Solution

The fourth proportional to 15,494.20, 21,382.02 and 8,420.68 is: 11,620.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.20 : 21,382.02 = 8,420.68 : x
  2. Step 2: Convert to fraction form
    15,494.20/21,382.02 = 8,420.68/x
  3. Step 3: Cross multiply
    15,494.20x = 21,382.02 × 8,420.68
  4. Step 4: Simplify right side
    15,494.20x = 180,051,148.17
  5. Step 5: Solve for x
    x = 180,051,148.17/15,494.20
  6. Step 6: Final answer
    x = 11,620.55

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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.