Home / 30,218.81-41,690.70-18,728.53

Finding the Fourth Proportional to 30,218.81, 41,690.70 and 18,728.53

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Solution

The fourth proportional to 30,218.81, 41,690.70 and 18,728.53 is: 25,838.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,218.81 : 41,690.70 = 18,728.53 : x
  2. Step 2: Convert to fraction form
    30,218.81/41,690.70 = 18,728.53/x
  3. Step 3: Cross multiply
    30,218.81x = 41,690.70 × 18,728.53
  4. Step 4: Simplify right side
    30,218.81x = 780,805,421.44
  5. Step 5: Solve for x
    x = 780,805,421.44/30,218.81
  6. Step 6: Final answer
    x = 25,838.40

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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.