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Finding the Fourth Proportional to 30,561.79, 45,893.61 and 20,630.58

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Solution

The fourth proportional to 30,561.79, 45,893.61 and 20,630.58 is: 30,980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,561.79 : 45,893.61 = 20,630.58 : x
  2. Step 2: Convert to fraction form
    30,561.79/45,893.61 = 20,630.58/x
  3. Step 3: Cross multiply
    30,561.79x = 45,893.61 × 20,630.58
  4. Step 4: Simplify right side
    30,561.79x = 946,811,792.59
  5. Step 5: Solve for x
    x = 946,811,792.59/30,561.79
  6. Step 6: Final answer
    x = 30,980.25

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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.