Home / 15,305,871.32-21,122,101.67-8,430,353.72

Finding the Fourth Proportional to 15,305,871.32, 21,122,101.67 and 8,430,353.72

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Solution

The fourth proportional to 15,305,871.32, 21,122,101.67 and 8,430,353.72 is: 11,633,887.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,305,871.32 : 21,122,101.67 = 8,430,353.72 : x
  2. Step 2: Convert to fraction form
    15,305,871.32/21,122,101.67 = 8,430,353.72/x
  3. Step 3: Cross multiply
    15,305,871.32x = 21,122,101.67 × 8,430,353.72
  4. Step 4: Simplify right side
    15,305,871.32x = 178,066,788,240,140.44
  5. Step 5: Solve for x
    x = 178,066,788,240,140.44/15,305,871.32
  6. Step 6: Final answer
    x = 11,633,887.71

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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.