Home / 13,607.87-18,778.77-7,639.52

Finding the Fourth Proportional to 13,607.87, 18,778.77 and 7,639.52

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Solution

The fourth proportional to 13,607.87, 18,778.77 and 7,639.52 is: 10,542.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.87 : 18,778.77 = 7,639.52 : x
  2. Step 2: Convert to fraction form
    13,607.87/18,778.77 = 7,639.52/x
  3. Step 3: Cross multiply
    13,607.87x = 18,778.77 × 7,639.52
  4. Step 4: Simplify right side
    13,607.87x = 143,460,695.10
  5. Step 5: Solve for x
    x = 143,460,695.10/13,607.87
  6. Step 6: Final answer
    x = 10,542.48

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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.