Home / 13,519.55-18,656.40-7,776.57

Finding the Fourth Proportional to 13,519.55, 18,656.40 and 7,776.57

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Solution

The fourth proportional to 13,519.55, 18,656.40 and 7,776.57 is: 10,731.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,519.55 : 18,656.40 = 7,776.57 : x
  2. Step 2: Convert to fraction form
    13,519.55/18,656.40 = 7,776.57/x
  3. Step 3: Cross multiply
    13,519.55x = 18,656.40 × 7,776.57
  4. Step 4: Simplify right side
    13,519.55x = 145,082,823.70
  5. Step 5: Solve for x
    x = 145,082,823.70/13,519.55
  6. Step 6: Final answer
    x = 10,731.33

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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.