Home / 21,189.88-31,772.50-8,035.07

Finding the Fourth Proportional to 21,189.88, 31,772.50 and 8,035.07

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Solution

The fourth proportional to 21,189.88, 31,772.50 and 8,035.07 is: 12,047.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.88 : 31,772.50 = 8,035.07 : x
  2. Step 2: Convert to fraction form
    21,189.88/31,772.50 = 8,035.07/x
  3. Step 3: Cross multiply
    21,189.88x = 31,772.50 × 8,035.07
  4. Step 4: Simplify right side
    21,189.88x = 255,294,261.58
  5. Step 5: Solve for x
    x = 255,294,261.58/21,189.88
  6. Step 6: Final answer
    x = 12,047.93

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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.