Home / 30,285.09-45,338.85-21,247.92

Finding the Fourth Proportional to 30,285.09, 45,338.85 and 21,247.92

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Solution

The fourth proportional to 30,285.09, 45,338.85 and 21,247.92 is: 31,809.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,285.09 : 45,338.85 = 21,247.92 : x
  2. Step 2: Convert to fraction form
    30,285.09/45,338.85 = 21,247.92/x
  3. Step 3: Cross multiply
    30,285.09x = 45,338.85 × 21,247.92
  4. Step 4: Simplify right side
    30,285.09x = 963,356,257.69
  5. Step 5: Solve for x
    x = 963,356,257.69/30,285.09
  6. Step 6: Final answer
    x = 31,809.59

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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.