Home / 31,120.83-42,896.54-21,045.60

Finding the Fourth Proportional to 31,120.83, 42,896.54 and 21,045.60

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Solution

The fourth proportional to 31,120.83, 42,896.54 and 21,045.60 is: 29,008.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,120.83 : 42,896.54 = 21,045.60 : x
  2. Step 2: Convert to fraction form
    31,120.83/42,896.54 = 21,045.60/x
  3. Step 3: Cross multiply
    31,120.83x = 42,896.54 × 21,045.60
  4. Step 4: Simplify right side
    31,120.83x = 902,783,474.84
  5. Step 5: Solve for x
    x = 902,783,474.84/31,120.83
  6. Step 6: Final answer
    x = 29,008.98

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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.