Home / 14,139.24-21,208.64-4,278.72

Finding the Fourth Proportional to 14,139.24, 21,208.64 and 4,278.72

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Solution

The fourth proportional to 14,139.24, 21,208.64 and 4,278.72 is: 6,418.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.24 : 21,208.64 = 4,278.72 : x
  2. Step 2: Convert to fraction form
    14,139.24/21,208.64 = 4,278.72/x
  3. Step 3: Cross multiply
    14,139.24x = 21,208.64 × 4,278.72
  4. Step 4: Simplify right side
    14,139.24x = 90,745,832.14
  5. Step 5: Solve for x
    x = 90,745,832.14/14,139.24
  6. Step 6: Final answer
    x = 6,418.01

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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.