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Finding the Fourth Proportional to 28,986.90, 40,698.30 and 28,986.90

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Solution

The fourth proportional to 28,986.90, 40,698.30 and 28,986.90 is: 40,698.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,986.90 : 40,698.30 = 28,986.90 : x
  2. Step 2: Convert to fraction form
    28,986.90/40,698.30 = 28,986.90/x
  3. Step 3: Cross multiply
    28,986.90x = 40,698.30 × 28,986.90
  4. Step 4: Simplify right side
    28,986.90x = 1,179,717,552.27
  5. Step 5: Solve for x
    x = 1,179,717,552.27/28,986.90
  6. Step 6: Final answer
    x = 40,698.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.