Home / 13,607.07-18,776.75-7,639.65

Finding the Fourth Proportional to 13,607.07, 18,776.75 and 7,639.65

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Solution

The fourth proportional to 13,607.07, 18,776.75 and 7,639.65 is: 10,542.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.07 : 18,776.75 = 7,639.65 : x
  2. Step 2: Convert to fraction form
    13,607.07/18,776.75 = 7,639.65/x
  3. Step 3: Cross multiply
    13,607.07x = 18,776.75 × 7,639.65
  4. Step 4: Simplify right side
    13,607.07x = 143,447,759.94
  5. Step 5: Solve for x
    x = 143,447,759.94/13,607.07
  6. Step 6: Final answer
    x = 10,542.15

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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.