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Finding the Fourth Proportional to 28,603, 42,917.46 and 13,809.16

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Solution

The fourth proportional to 28,603, 42,917.46 and 13,809.16 is: 20,720.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,603 : 42,917.46 = 13,809.16 : x
  2. Step 2: Convert to fraction form
    28,603/42,917.46 = 13,809.16/x
  3. Step 3: Cross multiply
    28,603x = 42,917.46 × 13,809.16
  4. Step 4: Simplify right side
    28,603x = 592,654,071.93
  5. Step 5: Solve for x
    x = 592,654,071.93/28,603
  6. Step 6: Final answer
    x = 20,720.00

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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.