Home / 21,018.13-28,999.91-12,514.80

Finding the Fourth Proportional to 21,018.13, 28,999.91 and 12,514.80

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Solution

The fourth proportional to 21,018.13, 28,999.91 and 12,514.80 is: 17,267.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.13 : 28,999.91 = 12,514.80 : x
  2. Step 2: Convert to fraction form
    21,018.13/28,999.91 = 12,514.80/x
  3. Step 3: Cross multiply
    21,018.13x = 28,999.91 × 12,514.80
  4. Step 4: Simplify right side
    21,018.13x = 362,928,011.09
  5. Step 5: Solve for x
    x = 362,928,011.09/21,018.13
  6. Step 6: Final answer
    x = 17,267.38

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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.