Home / 20,107.72-30,130.81-10,749.07

Finding the Fourth Proportional to 20,107.72, 30,130.81 and 10,749.07

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Solution

The fourth proportional to 20,107.72, 30,130.81 and 10,749.07 is: 16,107.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.72 : 30,130.81 = 10,749.07 : x
  2. Step 2: Convert to fraction form
    20,107.72/30,130.81 = 10,749.07/x
  3. Step 3: Cross multiply
    20,107.72x = 30,130.81 × 10,749.07
  4. Step 4: Simplify right side
    20,107.72x = 323,878,035.19
  5. Step 5: Solve for x
    x = 323,878,035.19/20,107.72
  6. Step 6: Final answer
    x = 16,107.15

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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.