Home / 19,891.19-27,421.58-15,822.34

Finding the Fourth Proportional to 19,891.19, 27,421.58 and 15,822.34

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Solution

The fourth proportional to 19,891.19, 27,421.58 and 15,822.34 is: 21,812.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,891.19 : 27,421.58 = 15,822.34 : x
  2. Step 2: Convert to fraction form
    19,891.19/27,421.58 = 15,822.34/x
  3. Step 3: Cross multiply
    19,891.19x = 27,421.58 × 15,822.34
  4. Step 4: Simplify right side
    19,891.19x = 433,873,533.10
  5. Step 5: Solve for x
    x = 433,873,533.10/19,891.19
  6. Step 6: Final answer
    x = 21,812.34

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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.