Home / 31,428.40-43,360.40-19,487.44

Finding the Fourth Proportional to 31,428.40, 43,360.40 and 19,487.44

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Solution

The fourth proportional to 31,428.40, 43,360.40 and 19,487.44 is: 26,885.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,428.40 : 43,360.40 = 19,487.44 : x
  2. Step 2: Convert to fraction form
    31,428.40/43,360.40 = 19,487.44/x
  3. Step 3: Cross multiply
    31,428.40x = 43,360.40 × 19,487.44
  4. Step 4: Simplify right side
    31,428.40x = 844,983,193.38
  5. Step 5: Solve for x
    x = 844,983,193.38/31,428.40
  6. Step 6: Final answer
    x = 26,885.98

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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.