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Finding the Fourth Proportional to 25,791.54, 38,679.59 and 7,779.01

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Solution

The fourth proportional to 25,791.54, 38,679.59 and 7,779.01 is: 11,666.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,791.54 : 38,679.59 = 7,779.01 : x
  2. Step 2: Convert to fraction form
    25,791.54/38,679.59 = 7,779.01/x
  3. Step 3: Cross multiply
    25,791.54x = 38,679.59 × 7,779.01
  4. Step 4: Simplify right side
    25,791.54x = 300,888,927.26
  5. Step 5: Solve for x
    x = 300,888,927.26/25,791.54
  6. Step 6: Final answer
    x = 11,666.19

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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.