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Finding the Fourth Proportional to 30,679.91, 42,328.10 and 25,004.91

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Solution

The fourth proportional to 30,679.91, 42,328.10 and 25,004.91 is: 34,498.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,679.91 : 42,328.10 = 25,004.91 : x
  2. Step 2: Convert to fraction form
    30,679.91/42,328.10 = 25,004.91/x
  3. Step 3: Cross multiply
    30,679.91x = 42,328.10 × 25,004.91
  4. Step 4: Simplify right side
    30,679.91x = 1,058,410,205.95
  5. Step 5: Solve for x
    x = 1,058,410,205.95/30,679.91
  6. Step 6: Final answer
    x = 34,498.48

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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.