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Finding the Fourth Proportional to 28,833, 39,789.54 and 15,585

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Solution

The fourth proportional to 28,833, 39,789.54 and 15,585 is: 21,507.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,833 : 39,789.54 = 15,585 : x
  2. Step 2: Convert to fraction form
    28,833/39,789.54 = 15,585/x
  3. Step 3: Cross multiply
    28,833x = 39,789.54 × 15,585
  4. Step 4: Simplify right side
    28,833x = 620,119,980.90
  5. Step 5: Solve for x
    x = 620,119,980.90/28,833
  6. Step 6: Final answer
    x = 21,507.30

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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.