Home / 20,276.87-30,415.50-7,129.35

Finding the Fourth Proportional to 20,276.87, 30,415.50 and 7,129.35

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Solution

The fourth proportional to 20,276.87, 30,415.50 and 7,129.35 is: 10,694.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,276.87 : 30,415.50 = 7,129.35 : x
  2. Step 2: Convert to fraction form
    20,276.87/30,415.50 = 7,129.35/x
  3. Step 3: Cross multiply
    20,276.87x = 30,415.50 × 7,129.35
  4. Step 4: Simplify right side
    20,276.87x = 216,842,744.93
  5. Step 5: Solve for x
    x = 216,842,744.93/20,276.87
  6. Step 6: Final answer
    x = 10,694.10

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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.