Home / 19,139.11-28,697.63-7,438.66

Finding the Fourth Proportional to 19,139.11, 28,697.63 and 7,438.66

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Solution

The fourth proportional to 19,139.11, 28,697.63 and 7,438.66 is: 11,153.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,139.11 : 28,697.63 = 7,438.66 : x
  2. Step 2: Convert to fraction form
    19,139.11/28,697.63 = 7,438.66/x
  3. Step 3: Cross multiply
    19,139.11x = 28,697.63 × 7,438.66
  4. Step 4: Simplify right side
    19,139.11x = 213,471,803.44
  5. Step 5: Solve for x
    x = 213,471,803.44/19,139.11
  6. Step 6: Final answer
    x = 11,153.70

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1.5x scale

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.