Home / 18,438.60-27,662.28-5,290.68

Finding the Fourth Proportional to 18,438.60, 27,662.28 and 5,290.68

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Solution

The fourth proportional to 18,438.60, 27,662.28 and 5,290.68 is: 7,937.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.60 : 27,662.28 = 5,290.68 : x
  2. Step 2: Convert to fraction form
    18,438.60/27,662.28 = 5,290.68/x
  3. Step 3: Cross multiply
    18,438.60x = 27,662.28 × 5,290.68
  4. Step 4: Simplify right side
    18,438.60x = 146,352,271.55
  5. Step 5: Solve for x
    x = 146,352,271.55/18,438.60
  6. Step 6: Final answer
    x = 7,937.28

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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.