Home / 11,828.40-16,313.16-7,111.80

Finding the Fourth Proportional to 11,828.40, 16,313.16 and 7,111.80

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Solution

The fourth proportional to 11,828.40, 16,313.16 and 7,111.80 is: 9,808.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,828.40 : 16,313.16 = 7,111.80 : x
  2. Step 2: Convert to fraction form
    11,828.40/16,313.16 = 7,111.80/x
  3. Step 3: Cross multiply
    11,828.40x = 16,313.16 × 7,111.80
  4. Step 4: Simplify right side
    11,828.40x = 116,015,931.29
  5. Step 5: Solve for x
    x = 116,015,931.29/11,828.40
  6. Step 6: Final answer
    x = 9,808.25

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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.