Home / 13,979.92-20,975.64-10,300.72

Finding the Fourth Proportional to 13,979.92, 20,975.64 and 10,300.72

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Solution

The fourth proportional to 13,979.92, 20,975.64 and 10,300.72 is: 15,455.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.92 : 20,975.64 = 10,300.72 : x
  2. Step 2: Convert to fraction form
    13,979.92/20,975.64 = 10,300.72/x
  3. Step 3: Cross multiply
    13,979.92x = 20,975.64 × 10,300.72
  4. Step 4: Simplify right side
    13,979.92x = 216,064,194.46
  5. Step 5: Solve for x
    x = 216,064,194.46/13,979.92
  6. Step 6: Final answer
    x = 15,455.32

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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.