Home / 11,309.36-15,603.75-8,911.89

Finding the Fourth Proportional to 11,309.36, 15,603.75 and 8,911.89

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Solution

The fourth proportional to 11,309.36, 15,603.75 and 8,911.89 is: 12,295.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,309.36 : 15,603.75 = 8,911.89 : x
  2. Step 2: Convert to fraction form
    11,309.36/15,603.75 = 8,911.89/x
  3. Step 3: Cross multiply
    11,309.36x = 15,603.75 × 8,911.89
  4. Step 4: Simplify right side
    11,309.36x = 139,058,903.59
  5. Step 5: Solve for x
    x = 139,058,903.59/11,309.36
  6. Step 6: Final answer
    x = 12,295.92

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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.