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Finding the Fourth Proportional to 19,139.63, 28,709.44 and 7,461.05

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Solution

The fourth proportional to 19,139.63, 28,709.44 and 7,461.05 is: 11,191.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,139.63 : 28,709.44 = 7,461.05 : x
  2. Step 2: Convert to fraction form
    19,139.63/28,709.44 = 7,461.05/x
  3. Step 3: Cross multiply
    19,139.63x = 28,709.44 × 7,461.05
  4. Step 4: Simplify right side
    19,139.63x = 214,202,405.11
  5. Step 5: Solve for x
    x = 214,202,405.11/19,139.63
  6. Step 6: Final answer
    x = 11,191.57

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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.