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Finding the Fourth Proportional to 15,858.60, 21,840.48 and 15,514.22

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Solution

The fourth proportional to 15,858.60, 21,840.48 and 15,514.22 is: 21,366.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,858.60 : 21,840.48 = 15,514.22 : x
  2. Step 2: Convert to fraction form
    15,858.60/21,840.48 = 15,514.22/x
  3. Step 3: Cross multiply
    15,858.60x = 21,840.48 × 15,514.22
  4. Step 4: Simplify right side
    15,858.60x = 338,837,902.42
  5. Step 5: Solve for x
    x = 338,837,902.42/15,858.60
  6. Step 6: Final answer
    x = 21,366.19

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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.