Home / 20,371,082.72-28,112,328.60-11,203,878.56

Finding the Fourth Proportional to 20,371,082.72, 28,112,328.60 and 11,203,878.56

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Solution

The fourth proportional to 20,371,082.72, 28,112,328.60 and 11,203,878.56 is: 15,461,481.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371,082.72 : 28,112,328.60 = 11,203,878.56 : x
  2. Step 2: Convert to fraction form
    20,371,082.72/28,112,328.60 = 11,203,878.56/x
  3. Step 3: Cross multiply
    20,371,082.72x = 28,112,328.60 × 11,203,878.56
  4. Step 4: Simplify right side
    20,371,082.72x = 314,967,115,673,214.88
  5. Step 5: Solve for x
    x = 314,967,115,673,214.88/20,371,082.72
  6. Step 6: Final answer
    x = 15,461,481.36

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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.