Home / 13,140.56-18,133.88-7,475.29

Finding the Fourth Proportional to 13,140.56, 18,133.88 and 7,475.29

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Solution

The fourth proportional to 13,140.56, 18,133.88 and 7,475.29 is: 10,315.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.56 : 18,133.88 = 7,475.29 : x
  2. Step 2: Convert to fraction form
    13,140.56/18,133.88 = 7,475.29/x
  3. Step 3: Cross multiply
    13,140.56x = 18,133.88 × 7,475.29
  4. Step 4: Simplify right side
    13,140.56x = 135,555,929.11
  5. Step 5: Solve for x
    x = 135,555,929.11/13,140.56
  6. Step 6: Final answer
    x = 10,315.84

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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.