Home / 31,420.40-43,349.36-19,479.44

Finding the Fourth Proportional to 31,420.40, 43,349.36 and 19,479.44

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Solution

The fourth proportional to 31,420.40, 43,349.36 and 19,479.44 is: 26,874.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,420.40 : 43,349.36 = 19,479.44 : x
  2. Step 2: Convert to fraction form
    31,420.40/43,349.36 = 19,479.44/x
  3. Step 3: Cross multiply
    31,420.40x = 43,349.36 × 19,479.44
  4. Step 4: Simplify right side
    31,420.40x = 844,421,257.16
  5. Step 5: Solve for x
    x = 844,421,257.16/31,420.40
  6. Step 6: Final answer
    x = 26,874.94

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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.