Home / 13,139.08-18,133.46-7,475.88

Finding the Fourth Proportional to 13,139.08, 18,133.46 and 7,475.88

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Solution

The fourth proportional to 13,139.08, 18,133.46 and 7,475.88 is: 10,317.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.08 : 18,133.46 = 7,475.88 : x
  2. Step 2: Convert to fraction form
    13,139.08/18,133.46 = 7,475.88/x
  3. Step 3: Cross multiply
    13,139.08x = 18,133.46 × 7,475.88
  4. Step 4: Simplify right side
    13,139.08x = 135,563,570.94
  5. Step 5: Solve for x
    x = 135,563,570.94/13,139.08
  6. Step 6: Final answer
    x = 10,317.58

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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.