Home / 13,140.66-18,130.82-8,431.32

Finding the Fourth Proportional to 13,140.66, 18,130.82 and 8,431.32

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Solution

The fourth proportional to 13,140.66, 18,130.82 and 8,431.32 is: 11,633.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.66 : 18,130.82 = 8,431.32 : x
  2. Step 2: Convert to fraction form
    13,140.66/18,130.82 = 8,431.32/x
  3. Step 3: Cross multiply
    13,140.66x = 18,130.82 × 8,431.32
  4. Step 4: Simplify right side
    13,140.66x = 152,866,745.28
  5. Step 5: Solve for x
    x = 152,866,745.28/13,140.66
  6. Step 6: Final answer
    x = 11,633.11

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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.