Home / 21,389.81-29,531.79-19,147.79

Finding the Fourth Proportional to 21,389.81, 29,531.79 and 19,147.79

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Solution

The fourth proportional to 21,389.81, 29,531.79 and 19,147.79 is: 26,436.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.81 : 29,531.79 = 19,147.79 : x
  2. Step 2: Convert to fraction form
    21,389.81/29,531.79 = 19,147.79/x
  3. Step 3: Cross multiply
    21,389.81x = 29,531.79 × 19,147.79
  4. Step 4: Simplify right side
    21,389.81x = 565,468,587.07
  5. Step 5: Solve for x
    x = 565,468,587.07/21,389.81
  6. Step 6: Final answer
    x = 26,436.36

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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.