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Finding the Fourth Proportional to 18,953.70, 28,430.60 and 5,806.08

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Solution

The fourth proportional to 18,953.70, 28,430.60 and 5,806.08 is: 8,709.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.70 : 28,430.60 = 5,806.08 : x
  2. Step 2: Convert to fraction form
    18,953.70/28,430.60 = 5,806.08/x
  3. Step 3: Cross multiply
    18,953.70x = 28,430.60 × 5,806.08
  4. Step 4: Simplify right side
    18,953.70x = 165,070,309.02
  5. Step 5: Solve for x
    x = 165,070,309.02/18,953.70
  6. Step 6: Final answer
    x = 8,709.14

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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.