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Finding the Fourth Proportional to 30,157.79, 41,617.59 and 16,728.90

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Solution

The fourth proportional to 30,157.79, 41,617.59 and 16,728.90 is: 23,085.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,157.79 : 41,617.59 = 16,728.90 : x
  2. Step 2: Convert to fraction form
    30,157.79/41,617.59 = 16,728.90/x
  3. Step 3: Cross multiply
    30,157.79x = 41,617.59 × 16,728.90
  4. Step 4: Simplify right side
    30,157.79x = 696,216,501.35
  5. Step 5: Solve for x
    x = 696,216,501.35/30,157.79
  6. Step 6: Final answer
    x = 23,085.80

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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.