Home / 13,921.28-20,890.04-5,162.32

Finding the Fourth Proportional to 13,921.28, 20,890.04 and 5,162.32

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Solution

The fourth proportional to 13,921.28, 20,890.04 and 5,162.32 is: 7,746.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.28 : 20,890.04 = 5,162.32 : x
  2. Step 2: Convert to fraction form
    13,921.28/20,890.04 = 5,162.32/x
  3. Step 3: Cross multiply
    13,921.28x = 20,890.04 × 5,162.32
  4. Step 4: Simplify right side
    13,921.28x = 107,841,071.29
  5. Step 5: Solve for x
    x = 107,841,071.29/13,921.28
  6. Step 6: Final answer
    x = 7,746.49

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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.