Home / 13,130.10-18,119.43-7,161.93

Finding the Fourth Proportional to 13,130.10, 18,119.43 and 7,161.93

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Solution

The fourth proportional to 13,130.10, 18,119.43 and 7,161.93 is: 9,883.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.10 : 18,119.43 = 7,161.93 : x
  2. Step 2: Convert to fraction form
    13,130.10/18,119.43 = 7,161.93/x
  3. Step 3: Cross multiply
    13,130.10x = 18,119.43 × 7,161.93
  4. Step 4: Simplify right side
    13,130.10x = 129,770,089.30
  5. Step 5: Solve for x
    x = 129,770,089.30/13,130.10
  6. Step 6: Final answer
    x = 9,883.40

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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.