Home / 13,520.36-18,655.80-7,855.28

Finding the Fourth Proportional to 13,520.36, 18,655.80 and 7,855.28

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Solution

The fourth proportional to 13,520.36, 18,655.80 and 7,855.28 is: 10,838.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.36 : 18,655.80 = 7,855.28 : x
  2. Step 2: Convert to fraction form
    13,520.36/18,655.80 = 7,855.28/x
  3. Step 3: Cross multiply
    13,520.36x = 18,655.80 × 7,855.28
  4. Step 4: Simplify right side
    13,520.36x = 146,546,532.62
  5. Step 5: Solve for x
    x = 146,546,532.62/13,520.36
  6. Step 6: Final answer
    x = 10,838.95

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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.