Home / 21,188.31-31,783.68-8,040.39

Finding the Fourth Proportional to 21,188.31, 31,783.68 and 8,040.39

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Solution

The fourth proportional to 21,188.31, 31,783.68 and 8,040.39 is: 12,061.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.31 : 31,783.68 = 8,040.39 : x
  2. Step 2: Convert to fraction form
    21,188.31/31,783.68 = 8,040.39/x
  3. Step 3: Cross multiply
    21,188.31x = 31,783.68 × 8,040.39
  4. Step 4: Simplify right side
    21,188.31x = 255,553,182.84
  5. Step 5: Solve for x
    x = 255,553,182.84/21,188.31
  6. Step 6: Final answer
    x = 12,061.05

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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.