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Finding the Fourth Proportional to 30,609.40, 45,941.10 and 18,113.80

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Solution

The fourth proportional to 30,609.40, 45,941.10 and 18,113.80 is: 27,186.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,609.40 : 45,941.10 = 18,113.80 : x
  2. Step 2: Convert to fraction form
    30,609.40/45,941.10 = 18,113.80/x
  3. Step 3: Cross multiply
    30,609.40x = 45,941.10 × 18,113.80
  4. Step 4: Simplify right side
    30,609.40x = 832,167,897.18
  5. Step 5: Solve for x
    x = 832,167,897.18/30,609.40
  6. Step 6: Final answer
    x = 27,186.68

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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.