Home / 31,428.90-43,361.09-19,487.94

Finding the Fourth Proportional to 31,428.90, 43,361.09 and 19,487.94

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Solution

The fourth proportional to 31,428.90, 43,361.09 and 19,487.94 is: 26,886.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,428.90 : 43,361.09 = 19,487.94 : x
  2. Step 2: Convert to fraction form
    31,428.90/43,361.09 = 19,487.94/x
  3. Step 3: Cross multiply
    31,428.90x = 43,361.09 × 19,487.94
  4. Step 4: Simplify right side
    31,428.90x = 845,018,320.25
  5. Step 5: Solve for x
    x = 845,018,320.25/31,428.90
  6. Step 6: Final answer
    x = 26,886.67

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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.