Home / 39,050.78-53,890.34-21,145.79

Finding the Fourth Proportional to 39,050.78, 53,890.34 and 21,145.79

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Solution

The fourth proportional to 39,050.78, 53,890.34 and 21,145.79 is: 29,181.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,050.78 : 53,890.34 = 21,145.79 : x
  2. Step 2: Convert to fraction form
    39,050.78/53,890.34 = 21,145.79/x
  3. Step 3: Cross multiply
    39,050.78x = 53,890.34 × 21,145.79
  4. Step 4: Simplify right side
    39,050.78x = 1,139,553,787.46
  5. Step 5: Solve for x
    x = 1,139,553,787.46/39,050.78
  6. Step 6: Final answer
    x = 29,181.33

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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.