Home / 20,518.62-28,325.90-12,972.56

Finding the Fourth Proportional to 20,518.62, 28,325.90 and 12,972.56

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Solution

The fourth proportional to 20,518.62, 28,325.90 and 12,972.56 is: 17,908.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.62 : 28,325.90 = 12,972.56 : x
  2. Step 2: Convert to fraction form
    20,518.62/28,325.90 = 12,972.56/x
  3. Step 3: Cross multiply
    20,518.62x = 28,325.90 × 12,972.56
  4. Step 4: Simplify right side
    20,518.62x = 367,459,328.11
  5. Step 5: Solve for x
    x = 367,459,328.11/20,518.62
  6. Step 6: Final answer
    x = 17,908.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.