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Finding the Fourth Proportional to 28,411.53, 42,617.39 and 8,690.00

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Solution

The fourth proportional to 28,411.53, 42,617.39 and 8,690.00 is: 13,035.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,411.53 : 42,617.39 = 8,690.00 : x
  2. Step 2: Convert to fraction form
    28,411.53/42,617.39 = 8,690.00/x
  3. Step 3: Cross multiply
    28,411.53x = 42,617.39 × 8,690.00
  4. Step 4: Simplify right side
    28,411.53x = 370,345,151.17
  5. Step 5: Solve for x
    x = 370,345,151.17/28,411.53
  6. Step 6: Final answer
    x = 13,035.03

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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.