Home / 15,401.53-21,253.63-8,687.06

Finding the Fourth Proportional to 15,401.53, 21,253.63 and 8,687.06

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Solution

The fourth proportional to 15,401.53, 21,253.63 and 8,687.06 is: 11,987.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,401.53 : 21,253.63 = 8,687.06 : x
  2. Step 2: Convert to fraction form
    15,401.53/21,253.63 = 8,687.06/x
  3. Step 3: Cross multiply
    15,401.53x = 21,253.63 × 8,687.06
  4. Step 4: Simplify right side
    15,401.53x = 184,631,599.68
  5. Step 5: Solve for x
    x = 184,631,599.68/15,401.53
  6. Step 6: Final answer
    x = 11,987.87

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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.