Home / 13,685.24-18,885.55-7,716.95

Finding the Fourth Proportional to 13,685.24, 18,885.55 and 7,716.95

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Solution

The fourth proportional to 13,685.24, 18,885.55 and 7,716.95 is: 10,649.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.24 : 18,885.55 = 7,716.95 : x
  2. Step 2: Convert to fraction form
    13,685.24/18,885.55 = 7,716.95/x
  3. Step 3: Cross multiply
    13,685.24x = 18,885.55 × 7,716.95
  4. Step 4: Simplify right side
    13,685.24x = 145,738,872.99
  5. Step 5: Solve for x
    x = 145,738,872.99/13,685.24
  6. Step 6: Final answer
    x = 10,649.35

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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.