Home / 21,099.87-31,639.34-7,055.09

Finding the Fourth Proportional to 21,099.87, 31,639.34 and 7,055.09

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Solution

The fourth proportional to 21,099.87, 31,639.34 and 7,055.09 is: 10,579.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,099.87 : 31,639.34 = 7,055.09 : x
  2. Step 2: Convert to fraction form
    21,099.87/31,639.34 = 7,055.09/x
  3. Step 3: Cross multiply
    21,099.87x = 31,639.34 × 7,055.09
  4. Step 4: Simplify right side
    21,099.87x = 223,218,197.77
  5. Step 5: Solve for x
    x = 223,218,197.77/21,099.87
  6. Step 6: Final answer
    x = 10,579.13

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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.