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Finding the Fourth Proportional to 18,955.61, 28,433.42 and 5,806.30

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Solution

The fourth proportional to 18,955.61, 28,433.42 and 5,806.30 is: 8,709.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955.61 : 28,433.42 = 5,806.30 : x
  2. Step 2: Convert to fraction form
    18,955.61/28,433.42 = 5,806.30/x
  3. Step 3: Cross multiply
    18,955.61x = 28,433.42 × 5,806.30
  4. Step 4: Simplify right side
    18,955.61x = 165,092,966.55
  5. Step 5: Solve for x
    x = 165,092,966.55/18,955.61
  6. Step 6: Final answer
    x = 8,709.45

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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.