Home / 21,515.25-29,688.39-12,556.25

Finding the Fourth Proportional to 21,515.25, 29,688.39 and 12,556.25

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Solution

The fourth proportional to 21,515.25, 29,688.39 and 12,556.25 is: 17,326.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.25 : 29,688.39 = 12,556.25 : x
  2. Step 2: Convert to fraction form
    21,515.25/29,688.39 = 12,556.25/x
  3. Step 3: Cross multiply
    21,515.25x = 29,688.39 × 12,556.25
  4. Step 4: Simplify right side
    21,515.25x = 372,774,698.50
  5. Step 5: Solve for x
    x = 372,774,698.50/21,515.25
  6. Step 6: Final answer
    x = 17,326.07

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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.