Home / 18,817.70-28,226.55-7,130.30

Finding the Fourth Proportional to 18,817.70, 28,226.55 and 7,130.30

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Solution

The fourth proportional to 18,817.70, 28,226.55 and 7,130.30 is: 10,695.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,817.70 : 28,226.55 = 7,130.30 : x
  2. Step 2: Convert to fraction form
    18,817.70/28,226.55 = 7,130.30/x
  3. Step 3: Cross multiply
    18,817.70x = 28,226.55 × 7,130.30
  4. Step 4: Simplify right side
    18,817.70x = 201,263,769.47
  5. Step 5: Solve for x
    x = 201,263,769.47/18,817.70
  6. Step 6: Final answer
    x = 10,695.45

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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.