Home / 15,087.75-20,820.47-8,373.66

Finding the Fourth Proportional to 15,087.75, 20,820.47 and 8,373.66

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Solution

The fourth proportional to 15,087.75, 20,820.47 and 8,373.66 is: 11,555.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,087.75 : 20,820.47 = 8,373.66 : x
  2. Step 2: Convert to fraction form
    15,087.75/20,820.47 = 8,373.66/x
  3. Step 3: Cross multiply
    15,087.75x = 20,820.47 × 8,373.66
  4. Step 4: Simplify right side
    15,087.75x = 174,343,536.82
  5. Step 5: Solve for x
    x = 174,343,536.82/15,087.75
  6. Step 6: Final answer
    x = 11,555.30

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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.