Home / 11,829.88-16,331.80-8,640

Finding the Fourth Proportional to 11,829.88, 16,331.80 and 8,640

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Solution

The fourth proportional to 11,829.88, 16,331.80 and 8,640 is: 11,928.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,829.88 : 16,331.80 = 8,640 : x
  2. Step 2: Convert to fraction form
    11,829.88/16,331.80 = 8,640/x
  3. Step 3: Cross multiply
    11,829.88x = 16,331.80 × 8,640
  4. Step 4: Simplify right side
    11,829.88x = 141,106,752
  5. Step 5: Solve for x
    x = 141,106,752/11,829.88
  6. Step 6: Final answer
    x = 11,928.00

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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.