Home / 10,515.99-15,771.55-3,118.67

Finding the Fourth Proportional to 10,515.99, 15,771.55 and 3,118.67

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Solution

The fourth proportional to 10,515.99, 15,771.55 and 3,118.67 is: 4,677.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.99 : 15,771.55 = 3,118.67 : x
  2. Step 2: Convert to fraction form
    10,515.99/15,771.55 = 3,118.67/x
  3. Step 3: Cross multiply
    10,515.99x = 15,771.55 × 3,118.67
  4. Step 4: Simplify right side
    10,515.99x = 49,186,259.84
  5. Step 5: Solve for x
    x = 49,186,259.84/10,515.99
  6. Step 6: Final answer
    x = 4,677.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.