Home / 15,494.40-21,382.02-8,420.94

Finding the Fourth Proportional to 15,494.40, 21,382.02 and 8,420.94

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Solution

The fourth proportional to 15,494.40, 21,382.02 and 8,420.94 is: 11,620.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.40 : 21,382.02 = 8,420.94 : x
  2. Step 2: Convert to fraction form
    15,494.40/21,382.02 = 8,420.94/x
  3. Step 3: Cross multiply
    15,494.40x = 21,382.02 × 8,420.94
  4. Step 4: Simplify right side
    15,494.40x = 180,056,707.50
  5. Step 5: Solve for x
    x = 180,056,707.50/15,494.40
  6. Step 6: Final answer
    x = 11,620.76

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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.