Home / 13,455.61-18,568.75-7,790.66

Finding the Fourth Proportional to 13,455.61, 18,568.75 and 7,790.66

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Solution

The fourth proportional to 13,455.61, 18,568.75 and 7,790.66 is: 10,751.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.61 : 18,568.75 = 7,790.66 : x
  2. Step 2: Convert to fraction form
    13,455.61/18,568.75 = 7,790.66/x
  3. Step 3: Cross multiply
    13,455.61x = 18,568.75 × 7,790.66
  4. Step 4: Simplify right side
    13,455.61x = 144,662,686.08
  5. Step 5: Solve for x
    x = 144,662,686.08/13,455.61
  6. Step 6: Final answer
    x = 10,751.11

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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.