Home / 21,127.69-29,160.84-13,958.79

Finding the Fourth Proportional to 21,127.69, 29,160.84 and 13,958.79

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Solution

The fourth proportional to 21,127.69, 29,160.84 and 13,958.79 is: 19,266.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.69 : 29,160.84 = 13,958.79 : x
  2. Step 2: Convert to fraction form
    21,127.69/29,160.84 = 13,958.79/x
  3. Step 3: Cross multiply
    21,127.69x = 29,160.84 × 13,958.79
  4. Step 4: Simplify right side
    21,127.69x = 407,050,041.78
  5. Step 5: Solve for x
    x = 407,050,041.78/21,127.69
  6. Step 6: Final answer
    x = 19,266.19

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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.