Home / 21,412.80-29,550.96-11,981.16

Finding the Fourth Proportional to 21,412.80, 29,550.96 and 11,981.16

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Solution

The fourth proportional to 21,412.80, 29,550.96 and 11,981.16 is: 16,534.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,412.80 : 29,550.96 = 11,981.16 : x
  2. Step 2: Convert to fraction form
    21,412.80/29,550.96 = 11,981.16/x
  3. Step 3: Cross multiply
    21,412.80x = 29,550.96 × 11,981.16
  4. Step 4: Simplify right side
    21,412.80x = 354,054,779.91
  5. Step 5: Solve for x
    x = 354,054,779.91/21,412.80
  6. Step 6: Final answer
    x = 16,534.73

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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.