Home / 15,401.52-21,252.78-8,685.81

Finding the Fourth Proportional to 15,401.52, 21,252.78 and 8,685.81

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Solution

The fourth proportional to 15,401.52, 21,252.78 and 8,685.81 is: 11,985.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,401.52 : 21,252.78 = 8,685.81 : x
  2. Step 2: Convert to fraction form
    15,401.52/21,252.78 = 8,685.81/x
  3. Step 3: Cross multiply
    15,401.52x = 21,252.78 × 8,685.81
  4. Step 4: Simplify right side
    15,401.52x = 184,597,609.05
  5. Step 5: Solve for x
    x = 184,597,609.05/15,401.52
  6. Step 6: Final answer
    x = 11,985.67

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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.