Home / 13,140.33-18,133.65-7,475.06

Finding the Fourth Proportional to 13,140.33, 18,133.65 and 7,475.06

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Solution

The fourth proportional to 13,140.33, 18,133.65 and 7,475.06 is: 10,315.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.33 : 18,133.65 = 7,475.06 : x
  2. Step 2: Convert to fraction form
    13,140.33/18,133.65 = 7,475.06/x
  3. Step 3: Cross multiply
    13,140.33x = 18,133.65 × 7,475.06
  4. Step 4: Simplify right side
    13,140.33x = 135,550,121.77
  5. Step 5: Solve for x
    x = 135,550,121.77/13,140.33
  6. Step 6: Final answer
    x = 10,315.58

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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.