Home / 20,579.03-28,388.63-13,012.62

Finding the Fourth Proportional to 20,579.03, 28,388.63 and 13,012.62

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Solution

The fourth proportional to 20,579.03, 28,388.63 and 13,012.62 is: 17,950.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.03 : 28,388.63 = 13,012.62 : x
  2. Step 2: Convert to fraction form
    20,579.03/28,388.63 = 13,012.62/x
  3. Step 3: Cross multiply
    20,579.03x = 28,388.63 × 13,012.62
  4. Step 4: Simplify right side
    20,579.03x = 369,410,307.39
  5. Step 5: Solve for x
    x = 369,410,307.39/20,579.03
  6. Step 6: Final answer
    x = 17,950.81

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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.