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Finding the Fourth Proportional to 34,765.89, 47,979.89 and 19,661.23

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Solution

The fourth proportional to 34,765.89, 47,979.89 and 19,661.23 is: 27,134.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,765.89 : 47,979.89 = 19,661.23 : x
  2. Step 2: Convert to fraction form
    34,765.89/47,979.89 = 19,661.23/x
  3. Step 3: Cross multiply
    34,765.89x = 47,979.89 × 19,661.23
  4. Step 4: Simplify right side
    34,765.89x = 943,343,688.06
  5. Step 5: Solve for x
    x = 943,343,688.06/34,765.89
  6. Step 6: Final answer
    x = 27,134.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.