Home / 13,684.12-18,883.71-7,715.74

Finding the Fourth Proportional to 13,684.12, 18,883.71 and 7,715.74

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Solution

The fourth proportional to 13,684.12, 18,883.71 and 7,715.74 is: 10,647.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,684.12 : 18,883.71 = 7,715.74 : x
  2. Step 2: Convert to fraction form
    13,684.12/18,883.71 = 7,715.74/x
  3. Step 3: Cross multiply
    13,684.12x = 18,883.71 × 7,715.74
  4. Step 4: Simplify right side
    13,684.12x = 145,701,796.60
  5. Step 5: Solve for x
    x = 145,701,796.60/13,684.12
  6. Step 6: Final answer
    x = 10,647.51

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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.