Home / 13,455.85-18,568.78-7,790.83

Finding the Fourth Proportional to 13,455.85, 18,568.78 and 7,790.83

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Solution

The fourth proportional to 13,455.85, 18,568.78 and 7,790.83 is: 10,751.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.85 : 18,568.78 = 7,790.83 : x
  2. Step 2: Convert to fraction form
    13,455.85/18,568.78 = 7,790.83/x
  3. Step 3: Cross multiply
    13,455.85x = 18,568.78 × 7,790.83
  4. Step 4: Simplify right side
    13,455.85x = 144,666,208.29
  5. Step 5: Solve for x
    x = 144,666,208.29/13,455.85
  6. Step 6: Final answer
    x = 10,751.18

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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.