Home / 15,215.51-20,995.32-8,500.31

Finding the Fourth Proportional to 15,215.51, 20,995.32 and 8,500.31

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Solution

The fourth proportional to 15,215.51, 20,995.32 and 8,500.31 is: 11,729.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.51 : 20,995.32 = 8,500.31 : x
  2. Step 2: Convert to fraction form
    15,215.51/20,995.32 = 8,500.31/x
  3. Step 3: Cross multiply
    15,215.51x = 20,995.32 × 8,500.31
  4. Step 4: Simplify right side
    15,215.51x = 178,466,623.57
  5. Step 5: Solve for x
    x = 178,466,623.57/15,215.51
  6. Step 6: Final answer
    x = 11,729.25

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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.