Home / 15,401.82-21,254.40-8,687.50

Finding the Fourth Proportional to 15,401.82, 21,254.40 and 8,687.50

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Solution

The fourth proportional to 15,401.82, 21,254.40 and 8,687.50 is: 11,988.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,401.82 : 21,254.40 = 8,687.50 : x
  2. Step 2: Convert to fraction form
    15,401.82/21,254.40 = 8,687.50/x
  3. Step 3: Cross multiply
    15,401.82x = 21,254.40 × 8,687.50
  4. Step 4: Simplify right side
    15,401.82x = 184,647,600
  5. Step 5: Solve for x
    x = 184,647,600/15,401.82
  6. Step 6: Final answer
    x = 11,988.69

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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.