Home / 15,493.32-21,381.11-8,420.21

Finding the Fourth Proportional to 15,493.32, 21,381.11 and 8,420.21

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Solution

The fourth proportional to 15,493.32, 21,381.11 and 8,420.21 is: 11,620.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,493.32 : 21,381.11 = 8,420.21 : x
  2. Step 2: Convert to fraction form
    15,493.32/21,381.11 = 8,420.21/x
  3. Step 3: Cross multiply
    15,493.32x = 21,381.11 × 8,420.21
  4. Step 4: Simplify right side
    15,493.32x = 180,033,287.23
  5. Step 5: Solve for x
    x = 180,033,287.23/15,493.32
  6. Step 6: Final answer
    x = 11,620.06

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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.