Home / 13,716.29-18,937.60-8,420.25

Finding the Fourth Proportional to 13,716.29, 18,937.60 and 8,420.25

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Solution

The fourth proportional to 13,716.29, 18,937.60 and 8,420.25 is: 11,625.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,716.29 : 18,937.60 = 8,420.25 : x
  2. Step 2: Convert to fraction form
    13,716.29/18,937.60 = 8,420.25/x
  3. Step 3: Cross multiply
    13,716.29x = 18,937.60 × 8,420.25
  4. Step 4: Simplify right side
    13,716.29x = 159,459,376.37
  5. Step 5: Solve for x
    x = 159,459,376.37/13,716.29
  6. Step 6: Final answer
    x = 11,625.55

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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.