Home / 15,494.01-21,381.67-8,420.41

Finding the Fourth Proportional to 15,494.01, 21,381.67 and 8,420.41

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Solution

The fourth proportional to 15,494.01, 21,381.67 and 8,420.41 is: 11,620.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.01 : 21,381.67 = 8,420.41 : x
  2. Step 2: Convert to fraction form
    15,494.01/21,381.67 = 8,420.41/x
  3. Step 3: Cross multiply
    15,494.01x = 21,381.67 × 8,420.41
  4. Step 4: Simplify right side
    15,494.01x = 180,042,427.88
  5. Step 5: Solve for x
    x = 180,042,427.88/15,494.01
  6. Step 6: Final answer
    x = 11,620.13

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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.