Home / 15,370.72-21,213.20-9,406.36

Finding the Fourth Proportional to 15,370.72, 21,213.20 and 9,406.36

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Solution

The fourth proportional to 15,370.72, 21,213.20 and 9,406.36 is: 12,981.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,370.72 : 21,213.20 = 9,406.36 : x
  2. Step 2: Convert to fraction form
    15,370.72/21,213.20 = 9,406.36/x
  3. Step 3: Cross multiply
    15,370.72x = 21,213.20 × 9,406.36
  4. Step 4: Simplify right side
    15,370.72x = 199,538,995.95
  5. Step 5: Solve for x
    x = 199,538,995.95/15,370.72
  6. Step 6: Final answer
    x = 12,981.76

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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.