Home / 13,635.48-18,815.85-7,666.03

Finding the Fourth Proportional to 13,635.48, 18,815.85 and 7,666.03

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Solution

The fourth proportional to 13,635.48, 18,815.85 and 7,666.03 is: 10,578.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,635.48 : 18,815.85 = 7,666.03 : x
  2. Step 2: Convert to fraction form
    13,635.48/18,815.85 = 7,666.03/x
  3. Step 3: Cross multiply
    13,635.48x = 18,815.85 × 7,666.03
  4. Step 4: Simplify right side
    13,635.48x = 144,242,776.50
  5. Step 5: Solve for x
    x = 144,242,776.50/13,635.48
  6. Step 6: Final answer
    x = 10,578.49

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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.