Home / 21,005.56-31,513.20-12,247.84

Finding the Fourth Proportional to 21,005.56, 31,513.20 and 12,247.84

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Solution

The fourth proportional to 21,005.56, 31,513.20 and 12,247.84 is: 18,374.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.56 : 31,513.20 = 12,247.84 : x
  2. Step 2: Convert to fraction form
    21,005.56/31,513.20 = 12,247.84/x
  3. Step 3: Cross multiply
    21,005.56x = 31,513.20 × 12,247.84
  4. Step 4: Simplify right side
    21,005.56x = 385,968,412.68
  5. Step 5: Solve for x
    x = 385,968,412.68/21,005.56
  6. Step 6: Final answer
    x = 18,374.59

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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.