Home / 20,685,812.80-31,028,719.20-18,453,760.60

Finding the Fourth Proportional to 20,685,812.80, 31,028,719.20 and 18,453,760.60

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Solution

The fourth proportional to 20,685,812.80, 31,028,719.20 and 18,453,760.60 is: 27,680,640.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685,812.80 : 31,028,719.20 = 18,453,760.60 : x
  2. Step 2: Convert to fraction form
    20,685,812.80/31,028,719.20 = 18,453,760.60/x
  3. Step 3: Cross multiply
    20,685,812.80x = 31,028,719.20 × 18,453,760.60
  4. Step 4: Simplify right side
    20,685,812.80x = 572,596,555,841,423.50
  5. Step 5: Solve for x
    x = 572,596,555,841,423.50/20,685,812.80
  6. Step 6: Final answer
    x = 27,680,640.90

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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.