Home / 13,137.94-18,130.74-7,169.99

Finding the Fourth Proportional to 13,137.94, 18,130.74 and 7,169.99

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Solution

The fourth proportional to 13,137.94, 18,130.74 and 7,169.99 is: 9,894.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.94 : 18,130.74 = 7,169.99 : x
  2. Step 2: Convert to fraction form
    13,137.94/18,130.74 = 7,169.99/x
  3. Step 3: Cross multiply
    13,137.94x = 18,130.74 × 7,169.99
  4. Step 4: Simplify right side
    13,137.94x = 129,997,208.94
  5. Step 5: Solve for x
    x = 129,997,208.94/13,137.94
  6. Step 6: Final answer
    x = 9,894.80

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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.