Home / 21,756.92-30,017.30-15,040.12

Finding the Fourth Proportional to 21,756.92, 30,017.30 and 15,040.12

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Solution

The fourth proportional to 21,756.92, 30,017.30 and 15,040.12 is: 20,750.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,756.92 : 30,017.30 = 15,040.12 : x
  2. Step 2: Convert to fraction form
    21,756.92/30,017.30 = 15,040.12/x
  3. Step 3: Cross multiply
    21,756.92x = 30,017.30 × 15,040.12
  4. Step 4: Simplify right side
    21,756.92x = 451,463,794.08
  5. Step 5: Solve for x
    x = 451,463,794.08/21,756.92
  6. Step 6: Final answer
    x = 20,750.35

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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.