Home / 18,989.62-28,490.58-9,129.67

Finding the Fourth Proportional to 18,989.62, 28,490.58 and 9,129.67

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Solution

The fourth proportional to 18,989.62, 28,490.58 and 9,129.67 is: 13,697.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.62 : 28,490.58 = 9,129.67 : x
  2. Step 2: Convert to fraction form
    18,989.62/28,490.58 = 9,129.67/x
  3. Step 3: Cross multiply
    18,989.62x = 28,490.58 × 9,129.67
  4. Step 4: Simplify right side
    18,989.62x = 260,109,522.28
  5. Step 5: Solve for x
    x = 260,109,522.28/18,989.62
  6. Step 6: Final answer
    x = 13,697.46

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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.