Home / 15,528.72-21,429.72-8,814.36

Finding the Fourth Proportional to 15,528.72, 21,429.72 and 8,814.36

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Solution

The fourth proportional to 15,528.72, 21,429.72 and 8,814.36 is: 12,163.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.72 : 21,429.72 = 8,814.36 : x
  2. Step 2: Convert to fraction form
    15,528.72/21,429.72 = 8,814.36/x
  3. Step 3: Cross multiply
    15,528.72x = 21,429.72 × 8,814.36
  4. Step 4: Simplify right side
    15,528.72x = 188,889,266.78
  5. Step 5: Solve for x
    x = 188,889,266.78/15,528.72
  6. Step 6: Final answer
    x = 12,163.87

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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.