Home / 13,991.51-20,985.19-5,104.76

Finding the Fourth Proportional to 13,991.51, 20,985.19 and 5,104.76

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Solution

The fourth proportional to 13,991.51, 20,985.19 and 5,104.76 is: 7,656.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.51 : 20,985.19 = 5,104.76 : x
  2. Step 2: Convert to fraction form
    13,991.51/20,985.19 = 5,104.76/x
  3. Step 3: Cross multiply
    13,991.51x = 20,985.19 × 5,104.76
  4. Step 4: Simplify right side
    13,991.51x = 107,124,358.50
  5. Step 5: Solve for x
    x = 107,124,358.50/13,991.51
  6. Step 6: Final answer
    x = 7,656.38

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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.