Home / 20,420.51-30,619.28-7,087.30

Finding the Fourth Proportional to 20,420.51, 30,619.28 and 7,087.30

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Solution

The fourth proportional to 20,420.51, 30,619.28 and 7,087.30 is: 10,626.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.51 : 30,619.28 = 7,087.30 : x
  2. Step 2: Convert to fraction form
    20,420.51/30,619.28 = 7,087.30/x
  3. Step 3: Cross multiply
    20,420.51x = 30,619.28 × 7,087.30
  4. Step 4: Simplify right side
    20,420.51x = 217,007,964.31
  5. Step 5: Solve for x
    x = 217,007,964.31/20,420.51
  6. Step 6: Final answer
    x = 10,626.96

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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.