Home / 15,361.80-21,204.36-9,697.20

Finding the Fourth Proportional to 15,361.80, 21,204.36 and 9,697.20

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Solution

The fourth proportional to 15,361.80, 21,204.36 and 9,697.20 is: 13,385.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,361.80 : 21,204.36 = 9,697.20 : x
  2. Step 2: Convert to fraction form
    15,361.80/21,204.36 = 9,697.20/x
  3. Step 3: Cross multiply
    15,361.80x = 21,204.36 × 9,697.20
  4. Step 4: Simplify right side
    15,361.80x = 205,622,919.79
  5. Step 5: Solve for x
    x = 205,622,919.79/15,361.80
  6. Step 6: Final answer
    x = 13,385.34

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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.