Home / 21,298.60-31,936.80-7,960.63

Finding the Fourth Proportional to 21,298.60, 31,936.80 and 7,960.63

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Solution

The fourth proportional to 21,298.60, 31,936.80 and 7,960.63 is: 11,936.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298.60 : 31,936.80 = 7,960.63 : x
  2. Step 2: Convert to fraction form
    21,298.60/31,936.80 = 7,960.63/x
  3. Step 3: Cross multiply
    21,298.60x = 31,936.80 × 7,960.63
  4. Step 4: Simplify right side
    21,298.60x = 254,237,048.18
  5. Step 5: Solve for x
    x = 254,237,048.18/21,298.60
  6. Step 6: Final answer
    x = 11,936.80

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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.