Home / 20,274.19-30,412.91-7,129.51

Finding the Fourth Proportional to 20,274.19, 30,412.91 and 7,129.51

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Solution

The fourth proportional to 20,274.19, 30,412.91 and 7,129.51 is: 10,694.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,274.19 : 30,412.91 = 7,129.51 : x
  2. Step 2: Convert to fraction form
    20,274.19/30,412.91 = 7,129.51/x
  3. Step 3: Cross multiply
    20,274.19x = 30,412.91 × 7,129.51
  4. Step 4: Simplify right side
    20,274.19x = 216,829,145.97
  5. Step 5: Solve for x
    x = 216,829,145.97/20,274.19
  6. Step 6: Final answer
    x = 10,694.84

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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.