Home / 13,349.88-18,421.86-7,381.20

Finding the Fourth Proportional to 13,349.88, 18,421.86 and 7,381.20

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Solution

The fourth proportional to 13,349.88, 18,421.86 and 7,381.20 is: 10,185.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,349.88 : 18,421.86 = 7,381.20 : x
  2. Step 2: Convert to fraction form
    13,349.88/18,421.86 = 7,381.20/x
  3. Step 3: Cross multiply
    13,349.88x = 18,421.86 × 7,381.20
  4. Step 4: Simplify right side
    13,349.88x = 135,975,433.03
  5. Step 5: Solve for x
    x = 135,975,433.03/13,349.88
  6. Step 6: Final answer
    x = 10,185.52

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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.