Home / 30,789.18-46,122.72-21,278.46

Finding the Fourth Proportional to 30,789.18, 46,122.72 and 21,278.46

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Solution

The fourth proportional to 30,789.18, 46,122.72 and 21,278.46 is: 31,875.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,789.18 : 46,122.72 = 21,278.46 : x
  2. Step 2: Convert to fraction form
    30,789.18/46,122.72 = 21,278.46/x
  3. Step 3: Cross multiply
    30,789.18x = 46,122.72 × 21,278.46
  4. Step 4: Simplify right side
    30,789.18x = 981,420,545.78
  5. Step 5: Solve for x
    x = 981,420,545.78/30,789.18
  6. Step 6: Final answer
    x = 31,875.50

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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.