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Finding the Fourth Proportional to 27,999.60, 41,999.40 and 21,001.20

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Solution

The fourth proportional to 27,999.60, 41,999.40 and 21,001.20 is: 31,501.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,999.60 : 41,999.40 = 21,001.20 : x
  2. Step 2: Convert to fraction form
    27,999.60/41,999.40 = 21,001.20/x
  3. Step 3: Cross multiply
    27,999.60x = 41,999.40 × 21,001.20
  4. Step 4: Simplify right side
    27,999.60x = 882,037,799.28
  5. Step 5: Solve for x
    x = 882,037,799.28/27,999.60
  6. Step 6: Final answer
    x = 31,501.80

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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.