Home / 13,138.05-18,130.02-7,169.58

Finding the Fourth Proportional to 13,138.05, 18,130.02 and 7,169.58

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Solution

The fourth proportional to 13,138.05, 18,130.02 and 7,169.58 is: 9,893.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.05 : 18,130.02 = 7,169.58 : x
  2. Step 2: Convert to fraction form
    13,138.05/18,130.02 = 7,169.58/x
  3. Step 3: Cross multiply
    13,138.05x = 18,130.02 × 7,169.58
  4. Step 4: Simplify right side
    13,138.05x = 129,984,628.79
  5. Step 5: Solve for x
    x = 129,984,628.79/13,138.05
  6. Step 6: Final answer
    x = 9,893.75

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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.