Home / 21,840.36-30,140.78-12,283.26

Finding the Fourth Proportional to 21,840.36, 30,140.78 and 12,283.26

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Solution

The fourth proportional to 21,840.36, 30,140.78 and 12,283.26 is: 16,951.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,840.36 : 30,140.78 = 12,283.26 : x
  2. Step 2: Convert to fraction form
    21,840.36/30,140.78 = 12,283.26/x
  3. Step 3: Cross multiply
    21,840.36x = 30,140.78 × 12,283.26
  4. Step 4: Simplify right side
    21,840.36x = 370,227,037.34
  5. Step 5: Solve for x
    x = 370,227,037.34/21,840.36
  6. Step 6: Final answer
    x = 16,951.51

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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.