Home / 21,430.16-29,574.84-11,998.64

Finding the Fourth Proportional to 21,430.16, 29,574.84 and 11,998.64

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Solution

The fourth proportional to 21,430.16, 29,574.84 and 11,998.64 is: 16,558.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.16 : 29,574.84 = 11,998.64 : x
  2. Step 2: Convert to fraction form
    21,430.16/29,574.84 = 11,998.64/x
  3. Step 3: Cross multiply
    21,430.16x = 29,574.84 × 11,998.64
  4. Step 4: Simplify right side
    21,430.16x = 354,857,858.22
  5. Step 5: Solve for x
    x = 354,857,858.22/21,430.16
  6. Step 6: Final answer
    x = 16,558.81

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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.