Home / 15,189,128.75-20,961,061.52-8,219,806.59

Finding the Fourth Proportional to 15,189,128.75, 20,961,061.52 and 8,219,806.59

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Solution

The fourth proportional to 15,189,128.75, 20,961,061.52 and 8,219,806.59 is: 11,343,367.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,189,128.75 : 20,961,061.52 = 8,219,806.59 : x
  2. Step 2: Convert to fraction form
    15,189,128.75/20,961,061.52 = 8,219,806.59/x
  3. Step 3: Cross multiply
    15,189,128.75x = 20,961,061.52 × 8,219,806.59
  4. Step 4: Simplify right side
    15,189,128.75x = 172,295,871,615,491.41
  5. Step 5: Solve for x
    x = 172,295,871,615,491.41/15,189,128.75
  6. Step 6: Final answer
    x = 11,343,367.64

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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.