Home / 13,723.86-18,931.95-8,679.57

Finding the Fourth Proportional to 13,723.86, 18,931.95 and 8,679.57

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Solution

The fourth proportional to 13,723.86, 18,931.95 and 8,679.57 is: 11,973.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,723.86 : 18,931.95 = 8,679.57 : x
  2. Step 2: Convert to fraction form
    13,723.86/18,931.95 = 8,679.57/x
  3. Step 3: Cross multiply
    13,723.86x = 18,931.95 × 8,679.57
  4. Step 4: Simplify right side
    13,723.86x = 164,321,185.26
  5. Step 5: Solve for x
    x = 164,321,185.26/13,723.86
  6. Step 6: Final answer
    x = 11,973.39

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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.