Home / 14,439.28-21,665.64-7,857.64

Finding the Fourth Proportional to 14,439.28, 21,665.64 and 7,857.64

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Solution

The fourth proportional to 14,439.28, 21,665.64 and 7,857.64 is: 11,790.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,439.28 : 21,665.64 = 7,857.64 : x
  2. Step 2: Convert to fraction form
    14,439.28/21,665.64 = 7,857.64/x
  3. Step 3: Cross multiply
    14,439.28x = 21,665.64 × 7,857.64
  4. Step 4: Simplify right side
    14,439.28x = 170,240,799.49
  5. Step 5: Solve for x
    x = 170,240,799.49/14,439.28
  6. Step 6: Final answer
    x = 11,790.12

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1.5x scale

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.