Home / 13,140.56-18,133.24-7,551.60

Finding the Fourth Proportional to 13,140.56, 18,133.24 and 7,551.60

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Solution

The fourth proportional to 13,140.56, 18,133.24 and 7,551.60 is: 10,420.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.56 : 18,133.24 = 7,551.60 : x
  2. Step 2: Convert to fraction form
    13,140.56/18,133.24 = 7,551.60/x
  3. Step 3: Cross multiply
    13,140.56x = 18,133.24 × 7,551.60
  4. Step 4: Simplify right side
    13,140.56x = 136,934,975.18
  5. Step 5: Solve for x
    x = 136,934,975.18/13,140.56
  6. Step 6: Final answer
    x = 10,420.79

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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.