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Finding the Fourth Proportional to 28,804, 39,749.52 and 15,556

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Solution

The fourth proportional to 28,804, 39,749.52 and 15,556 is: 21,467.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,804 : 39,749.52 = 15,556 : x
  2. Step 2: Convert to fraction form
    28,804/39,749.52 = 15,556/x
  3. Step 3: Cross multiply
    28,804x = 39,749.52 × 15,556
  4. Step 4: Simplify right side
    28,804x = 618,343,533.12
  5. Step 5: Solve for x
    x = 618,343,533.12/28,804
  6. Step 6: Final answer
    x = 21,467.28

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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.