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Finding the Fourth Proportional to 28,986.28, 43,486.48 and 8,995.28

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Solution

The fourth proportional to 28,986.28, 43,486.48 and 8,995.28 is: 13,495.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,986.28 : 43,486.48 = 8,995.28 : x
  2. Step 2: Convert to fraction form
    28,986.28/43,486.48 = 8,995.28/x
  3. Step 3: Cross multiply
    28,986.28x = 43,486.48 × 8,995.28
  4. Step 4: Simplify right side
    28,986.28x = 391,173,063.81
  5. Step 5: Solve for x
    x = 391,173,063.81/28,986.28
  6. Step 6: Final answer
    x = 13,495.11

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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.