Home / 21,748.57-30,015.14-12,190.07

Finding the Fourth Proportional to 21,748.57, 30,015.14 and 12,190.07

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Solution

The fourth proportional to 21,748.57, 30,015.14 and 12,190.07 is: 16,823.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,748.57 : 30,015.14 = 12,190.07 : x
  2. Step 2: Convert to fraction form
    21,748.57/30,015.14 = 12,190.07/x
  3. Step 3: Cross multiply
    21,748.57x = 30,015.14 × 12,190.07
  4. Step 4: Simplify right side
    21,748.57x = 365,886,671.75
  5. Step 5: Solve for x
    x = 365,886,671.75/21,748.57
  6. Step 6: Final answer
    x = 16,823.48

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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.