Home / 30,647.75-42,265.81-19,881.41

Finding the Fourth Proportional to 30,647.75, 42,265.81 and 19,881.41

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Solution

The fourth proportional to 30,647.75, 42,265.81 and 19,881.41 is: 27,418.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,647.75 : 42,265.81 = 19,881.41 : x
  2. Step 2: Convert to fraction form
    30,647.75/42,265.81 = 19,881.41/x
  3. Step 3: Cross multiply
    30,647.75x = 42,265.81 × 19,881.41
  4. Step 4: Simplify right side
    30,647.75x = 840,303,897.59
  5. Step 5: Solve for x
    x = 840,303,897.59/30,647.75
  6. Step 6: Final answer
    x = 27,418.13

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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.