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Finding the Fourth Proportional to 30,621.55, 45,858.21 and 15,589.21

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Solution

The fourth proportional to 30,621.55, 45,858.21 and 15,589.21 is: 23,346.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,621.55 : 45,858.21 = 15,589.21 : x
  2. Step 2: Convert to fraction form
    30,621.55/45,858.21 = 15,589.21/x
  3. Step 3: Cross multiply
    30,621.55x = 45,858.21 × 15,589.21
  4. Step 4: Simplify right side
    30,621.55x = 714,893,265.91
  5. Step 5: Solve for x
    x = 714,893,265.91/30,621.55
  6. Step 6: Final answer
    x = 23,346.08

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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.