Home / 28,108.64-38,789.40-15,533.12

Finding the Fourth Proportional to 28,108.64, 38,789.40 and 15,533.12

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Solution

The fourth proportional to 28,108.64, 38,789.40 and 15,533.12 is: 21,435.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.64 : 38,789.40 = 15,533.12 : x
  2. Step 2: Convert to fraction form
    28,108.64/38,789.40 = 15,533.12/x
  3. Step 3: Cross multiply
    28,108.64x = 38,789.40 × 15,533.12
  4. Step 4: Simplify right side
    28,108.64x = 602,520,404.93
  5. Step 5: Solve for x
    x = 602,520,404.93/28,108.64
  6. Step 6: Final answer
    x = 21,435.42

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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.