Home / 19,937.81-27,503.20-13,978.37

Finding the Fourth Proportional to 19,937.81, 27,503.20 and 13,978.37

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Solution

The fourth proportional to 19,937.81, 27,503.20 and 13,978.37 is: 19,282.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,937.81 : 27,503.20 = 13,978.37 : x
  2. Step 2: Convert to fraction form
    19,937.81/27,503.20 = 13,978.37/x
  3. Step 3: Cross multiply
    19,937.81x = 27,503.20 × 13,978.37
  4. Step 4: Simplify right side
    19,937.81x = 384,449,905.78
  5. Step 5: Solve for x
    x = 384,449,905.78/19,937.81
  6. Step 6: Final answer
    x = 19,282.45

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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.