Home / 21,439.08-29,576.04-13,887.92

Finding the Fourth Proportional to 21,439.08, 29,576.04 and 13,887.92

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Solution

The fourth proportional to 21,439.08, 29,576.04 and 13,887.92 is: 19,158.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439.08 : 29,576.04 = 13,887.92 : x
  2. Step 2: Convert to fraction form
    21,439.08/29,576.04 = 13,887.92/x
  3. Step 3: Cross multiply
    21,439.08x = 29,576.04 × 13,887.92
  4. Step 4: Simplify right side
    21,439.08x = 410,749,677.44
  5. Step 5: Solve for x
    x = 410,749,677.44/21,439.08
  6. Step 6: Final answer
    x = 19,158.92

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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.