Home / 13,455.47-18,568.26-7,790.47

Finding the Fourth Proportional to 13,455.47, 18,568.26 and 7,790.47

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Solution

The fourth proportional to 13,455.47, 18,568.26 and 7,790.47 is: 10,750.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.47 : 18,568.26 = 7,790.47 : x
  2. Step 2: Convert to fraction form
    13,455.47/18,568.26 = 7,790.47/x
  3. Step 3: Cross multiply
    13,455.47x = 18,568.26 × 7,790.47
  4. Step 4: Simplify right side
    13,455.47x = 144,655,472.48
  5. Step 5: Solve for x
    x = 144,655,472.48/13,455.47
  6. Step 6: Final answer
    x = 10,750.68

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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.