Home / 10,921.12-16,361.12-6,465.60

Finding the Fourth Proportional to 10,921.12, 16,361.12 and 6,465.60

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Solution

The fourth proportional to 10,921.12, 16,361.12 and 6,465.60 is: 9,686.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.12 : 16,361.12 = 6,465.60 : x
  2. Step 2: Convert to fraction form
    10,921.12/16,361.12 = 6,465.60/x
  3. Step 3: Cross multiply
    10,921.12x = 16,361.12 × 6,465.60
  4. Step 4: Simplify right side
    10,921.12x = 105,784,457.47
  5. Step 5: Solve for x
    x = 105,784,457.47/10,921.12
  6. Step 6: Final answer
    x = 9,686.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.