Home / 20,812.10-31,200.60-9,712.94

Finding the Fourth Proportional to 20,812.10, 31,200.60 and 9,712.94

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Solution

The fourth proportional to 20,812.10, 31,200.60 and 9,712.94 is: 14,561.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.10 : 31,200.60 = 9,712.94 : x
  2. Step 2: Convert to fraction form
    20,812.10/31,200.60 = 9,712.94/x
  3. Step 3: Cross multiply
    20,812.10x = 31,200.60 × 9,712.94
  4. Step 4: Simplify right side
    20,812.10x = 303,049,555.76
  5. Step 5: Solve for x
    x = 303,049,555.76/20,812.10
  6. Step 6: Final answer
    x = 14,561.22

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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.