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Finding the Fourth Proportional to 30,407.63, 41,962.05 and 16,979.09

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Solution

The fourth proportional to 30,407.63, 41,962.05 and 16,979.09 is: 23,430.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,407.63 : 41,962.05 = 16,979.09 : x
  2. Step 2: Convert to fraction form
    30,407.63/41,962.05 = 16,979.09/x
  3. Step 3: Cross multiply
    30,407.63x = 41,962.05 × 16,979.09
  4. Step 4: Simplify right side
    30,407.63x = 712,477,213.72
  5. Step 5: Solve for x
    x = 712,477,213.72/30,407.63
  6. Step 6: Final answer
    x = 23,430.87

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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.