Home / 21,379.12-29,476.20-13,812.64

Finding the Fourth Proportional to 21,379.12, 29,476.20 and 13,812.64

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Solution

The fourth proportional to 21,379.12, 29,476.20 and 13,812.64 is: 19,044.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.12 : 29,476.20 = 13,812.64 : x
  2. Step 2: Convert to fraction form
    21,379.12/29,476.20 = 13,812.64/x
  3. Step 3: Cross multiply
    21,379.12x = 29,476.20 × 13,812.64
  4. Step 4: Simplify right side
    21,379.12x = 407,144,139.17
  5. Step 5: Solve for x
    x = 407,144,139.17/21,379.12
  6. Step 6: Final answer
    x = 19,044.01

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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.