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Finding the Fourth Proportional to 27,172.48, 40,698.50 and 20,886.20

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Solution

The fourth proportional to 27,172.48, 40,698.50 and 20,886.20 is: 31,283.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,172.48 : 40,698.50 = 20,886.20 : x
  2. Step 2: Convert to fraction form
    27,172.48/40,698.50 = 20,886.20/x
  3. Step 3: Cross multiply
    27,172.48x = 40,698.50 × 20,886.20
  4. Step 4: Simplify right side
    27,172.48x = 850,037,010.70
  5. Step 5: Solve for x
    x = 850,037,010.70/27,172.48
  6. Step 6: Final answer
    x = 31,283.01

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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.