Home / 13,630.40-18,808.32-7,661.28

Finding the Fourth Proportional to 13,630.40, 18,808.32 and 7,661.28

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Solution

The fourth proportional to 13,630.40, 18,808.32 and 7,661.28 is: 10,571.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.40 : 18,808.32 = 7,661.28 : x
  2. Step 2: Convert to fraction form
    13,630.40/18,808.32 = 7,661.28/x
  3. Step 3: Cross multiply
    13,630.40x = 18,808.32 × 7,661.28
  4. Step 4: Simplify right side
    13,630.40x = 144,095,805.85
  5. Step 5: Solve for x
    x = 144,095,805.85/13,630.40
  6. Step 6: Final answer
    x = 10,571.65

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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.