Home / 19,178.07-28,765.02-5,139.48

Finding the Fourth Proportional to 19,178.07, 28,765.02 and 5,139.48

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Solution

The fourth proportional to 19,178.07, 28,765.02 and 5,139.48 is: 7,708.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,178.07 : 28,765.02 = 5,139.48 : x
  2. Step 2: Convert to fraction form
    19,178.07/28,765.02 = 5,139.48/x
  3. Step 3: Cross multiply
    19,178.07x = 28,765.02 × 5,139.48
  4. Step 4: Simplify right side
    19,178.07x = 147,837,372.13
  5. Step 5: Solve for x
    x = 147,837,372.13/19,178.07
  6. Step 6: Final answer
    x = 7,708.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.