Home / 20,279.71-30,421.16-7,135.03

Finding the Fourth Proportional to 20,279.71, 30,421.16 and 7,135.03

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Solution

The fourth proportional to 20,279.71, 30,421.16 and 7,135.03 is: 10,703.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.71 : 30,421.16 = 7,135.03 : x
  2. Step 2: Convert to fraction form
    20,279.71/30,421.16 = 7,135.03/x
  3. Step 3: Cross multiply
    20,279.71x = 30,421.16 × 7,135.03
  4. Step 4: Simplify right side
    20,279.71x = 217,055,889.23
  5. Step 5: Solve for x
    x = 217,055,889.23/20,279.71
  6. Step 6: Final answer
    x = 10,703.11

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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.