Home / 13,904.58-20,859.61-5,139.57

Finding the Fourth Proportional to 13,904.58, 20,859.61 and 5,139.57

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Solution

The fourth proportional to 13,904.58, 20,859.61 and 5,139.57 is: 7,710.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,904.58 : 20,859.61 = 5,139.57 : x
  2. Step 2: Convert to fraction form
    13,904.58/20,859.61 = 5,139.57/x
  3. Step 3: Cross multiply
    13,904.58x = 20,859.61 × 5,139.57
  4. Step 4: Simplify right side
    13,904.58x = 107,209,425.77
  5. Step 5: Solve for x
    x = 107,209,425.77/13,904.58
  6. Step 6: Final answer
    x = 7,710.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.