Home / 21,437.65-29,577.09-13,889.80

Finding the Fourth Proportional to 21,437.65, 29,577.09 and 13,889.80

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Solution

The fourth proportional to 21,437.65, 29,577.09 and 13,889.80 is: 19,163.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,437.65 : 29,577.09 = 13,889.80 : x
  2. Step 2: Convert to fraction form
    21,437.65/29,577.09 = 13,889.80/x
  3. Step 3: Cross multiply
    21,437.65x = 29,577.09 × 13,889.80
  4. Step 4: Simplify right side
    21,437.65x = 410,819,864.68
  5. Step 5: Solve for x
    x = 410,819,864.68/21,437.65
  6. Step 6: Final answer
    x = 19,163.47

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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.