Home / 13,760.16-18,988.50-7,790.64

Finding the Fourth Proportional to 13,760.16, 18,988.50 and 7,790.64

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Solution

The fourth proportional to 13,760.16, 18,988.50 and 7,790.64 is: 10,750.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,760.16 : 18,988.50 = 7,790.64 : x
  2. Step 2: Convert to fraction form
    13,760.16/18,988.50 = 7,790.64/x
  3. Step 3: Cross multiply
    13,760.16x = 18,988.50 × 7,790.64
  4. Step 4: Simplify right side
    13,760.16x = 147,932,567.64
  5. Step 5: Solve for x
    x = 147,932,567.64/13,760.16
  6. Step 6: Final answer
    x = 10,750.79

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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.