Home / 31,406.75-47,131.73-12,938.75

Finding the Fourth Proportional to 31,406.75, 47,131.73 and 12,938.75

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Solution

The fourth proportional to 31,406.75, 47,131.73 and 12,938.75 is: 19,417.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,406.75 : 47,131.73 = 12,938.75 : x
  2. Step 2: Convert to fraction form
    31,406.75/47,131.73 = 12,938.75/x
  3. Step 3: Cross multiply
    31,406.75x = 47,131.73 × 12,938.75
  4. Step 4: Simplify right side
    31,406.75x = 609,825,606.84
  5. Step 5: Solve for x
    x = 609,825,606.84/31,406.75
  6. Step 6: Final answer
    x = 19,417.02

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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.