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Finding the Fourth Proportional to 28,690.11, 42,943.03 and 15,329.70

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Solution

The fourth proportional to 28,690.11, 42,943.03 and 15,329.70 is: 22,945.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,690.11 : 42,943.03 = 15,329.70 : x
  2. Step 2: Convert to fraction form
    28,690.11/42,943.03 = 15,329.70/x
  3. Step 3: Cross multiply
    28,690.11x = 42,943.03 × 15,329.70
  4. Step 4: Simplify right side
    28,690.11x = 658,303,728.67
  5. Step 5: Solve for x
    x = 658,303,728.67/28,690.11
  6. Step 6: Final answer
    x = 22,945.32

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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.