Home / 13,723.74-18,931.79-8,679.46

Finding the Fourth Proportional to 13,723.74, 18,931.79 and 8,679.46

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Solution

The fourth proportional to 13,723.74, 18,931.79 and 8,679.46 is: 11,973.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,723.74 : 18,931.79 = 8,679.46 : x
  2. Step 2: Convert to fraction form
    13,723.74/18,931.79 = 8,679.46/x
  3. Step 3: Cross multiply
    13,723.74x = 18,931.79 × 8,679.46
  4. Step 4: Simplify right side
    13,723.74x = 164,317,714.03
  5. Step 5: Solve for x
    x = 164,317,714.03/13,723.74
  6. Step 6: Final answer
    x = 11,973.25

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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.