Home / 21,005.09-28,987.77-12,054.41

Finding the Fourth Proportional to 21,005.09, 28,987.77 and 12,054.41

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Solution

The fourth proportional to 21,005.09, 28,987.77 and 12,054.41 is: 16,635.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.09 : 28,987.77 = 12,054.41 : x
  2. Step 2: Convert to fraction form
    21,005.09/28,987.77 = 12,054.41/x
  3. Step 3: Cross multiply
    21,005.09x = 28,987.77 × 12,054.41
  4. Step 4: Simplify right side
    21,005.09x = 349,430,464.57
  5. Step 5: Solve for x
    x = 349,430,464.57/21,005.09
  6. Step 6: Final answer
    x = 16,635.51

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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.