Home / 21,357.36-29,487-19,115.34

Finding the Fourth Proportional to 21,357.36, 29,487 and 19,115.34

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Solution

The fourth proportional to 21,357.36, 29,487 and 19,115.34 is: 26,391.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,357.36 : 29,487 = 19,115.34 : x
  2. Step 2: Convert to fraction form
    21,357.36/29,487 = 19,115.34/x
  3. Step 3: Cross multiply
    21,357.36x = 29,487 × 19,115.34
  4. Step 4: Simplify right side
    21,357.36x = 563,654,030.58
  5. Step 5: Solve for x
    x = 563,654,030.58/21,357.36
  6. Step 6: Final answer
    x = 26,391.56

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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.