Home / 21,178.23-31,775.71-10,089.87

Finding the Fourth Proportional to 21,178.23, 31,775.71 and 10,089.87

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Solution

The fourth proportional to 21,178.23, 31,775.71 and 10,089.87 is: 15,138.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.23 : 31,775.71 = 10,089.87 : x
  2. Step 2: Convert to fraction form
    21,178.23/31,775.71 = 10,089.87/x
  3. Step 3: Cross multiply
    21,178.23x = 31,775.71 × 10,089.87
  4. Step 4: Simplify right side
    21,178.23x = 320,612,783.06
  5. Step 5: Solve for x
    x = 320,612,783.06/21,178.23
  6. Step 6: Final answer
    x = 15,138.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.