Home / 20,279.79-30,421.47-7,132.26

Finding the Fourth Proportional to 20,279.79, 30,421.47 and 7,132.26

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Solution

The fourth proportional to 20,279.79, 30,421.47 and 7,132.26 is: 10,699.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.79 : 30,421.47 = 7,132.26 : x
  2. Step 2: Convert to fraction form
    20,279.79/30,421.47 = 7,132.26/x
  3. Step 3: Cross multiply
    20,279.79x = 30,421.47 × 7,132.26
  4. Step 4: Simplify right side
    20,279.79x = 216,973,833.62
  5. Step 5: Solve for x
    x = 216,973,833.62/20,279.79
  6. Step 6: Final answer
    x = 10,699.02

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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.