Home / 39,720.05-54,813.69-21,815.94

Finding the Fourth Proportional to 39,720.05, 54,813.69 and 21,815.94

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Solution

The fourth proportional to 39,720.05, 54,813.69 and 21,815.94 is: 30,106.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,720.05 : 54,813.69 = 21,815.94 : x
  2. Step 2: Convert to fraction form
    39,720.05/54,813.69 = 21,815.94/x
  3. Step 3: Cross multiply
    39,720.05x = 54,813.69 × 21,815.94
  4. Step 4: Simplify right side
    39,720.05x = 1,195,812,172.22
  5. Step 5: Solve for x
    x = 1,195,812,172.22/39,720.05
  6. Step 6: Final answer
    x = 30,106.01

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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.