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Finding the Fourth Proportional to 30,660.01, 42,309.50 and 17,913.90

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Solution

The fourth proportional to 30,660.01, 42,309.50 and 17,913.90 is: 24,720.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,660.01 : 42,309.50 = 17,913.90 : x
  2. Step 2: Convert to fraction form
    30,660.01/42,309.50 = 17,913.90/x
  3. Step 3: Cross multiply
    30,660.01x = 42,309.50 × 17,913.90
  4. Step 4: Simplify right side
    30,660.01x = 757,928,152.05
  5. Step 5: Solve for x
    x = 757,928,152.05/30,660.01
  6. Step 6: Final answer
    x = 24,720.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.