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Finding the Fourth Proportional to 15,810.01, 21,817.88 and 8,640.07

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Solution

The fourth proportional to 15,810.01, 21,817.88 and 8,640.07 is: 11,923.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,810.01 : 21,817.88 = 8,640.07 : x
  2. Step 2: Convert to fraction form
    15,810.01/21,817.88 = 8,640.07/x
  3. Step 3: Cross multiply
    15,810.01x = 21,817.88 × 8,640.07
  4. Step 4: Simplify right side
    15,810.01x = 188,507,858.16
  5. Step 5: Solve for x
    x = 188,507,858.16/15,810.01
  6. Step 6: Final answer
    x = 11,923.33

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1.5x scale

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.