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Finding the Fourth Proportional to 28,465.50, 42,698.25 and 7,689

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Solution

The fourth proportional to 28,465.50, 42,698.25 and 7,689 is: 11,533.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,465.50 : 42,698.25 = 7,689 : x
  2. Step 2: Convert to fraction form
    28,465.50/42,698.25 = 7,689/x
  3. Step 3: Cross multiply
    28,465.50x = 42,698.25 × 7,689
  4. Step 4: Simplify right side
    28,465.50x = 328,306,844.25
  5. Step 5: Solve for x
    x = 328,306,844.25/28,465.50
  6. Step 6: Final answer
    x = 11,533.50

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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.