Home / 13,990.99-20,981.45-4,629.28

Finding the Fourth Proportional to 13,990.99, 20,981.45 and 4,629.28

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Solution

The fourth proportional to 13,990.99, 20,981.45 and 4,629.28 is: 6,942.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.99 : 20,981.45 = 4,629.28 : x
  2. Step 2: Convert to fraction form
    13,990.99/20,981.45 = 4,629.28/x
  3. Step 3: Cross multiply
    13,990.99x = 20,981.45 × 4,629.28
  4. Step 4: Simplify right side
    13,990.99x = 97,129,053.52
  5. Step 5: Solve for x
    x = 97,129,053.52/13,990.99
  6. Step 6: Final answer
    x = 6,942.26

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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.