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Finding the Fourth Proportional to 15,824.78, 21,835.80 and 8,751.25

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Solution

The fourth proportional to 15,824.78, 21,835.80 and 8,751.25 is: 12,075.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,824.78 : 21,835.80 = 8,751.25 : x
  2. Step 2: Convert to fraction form
    15,824.78/21,835.80 = 8,751.25/x
  3. Step 3: Cross multiply
    15,824.78x = 21,835.80 × 8,751.25
  4. Step 4: Simplify right side
    15,824.78x = 191,090,490.16
  5. Step 5: Solve for x
    x = 191,090,490.16/15,824.78
  6. Step 6: Final answer
    x = 12,075.40

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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.