Home / 31,987.81-44,128.91-18,551.28

Finding the Fourth Proportional to 31,987.81, 44,128.91 and 18,551.28

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Solution

The fourth proportional to 31,987.81, 44,128.91 and 18,551.28 is: 25,592.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,987.81 : 44,128.91 = 18,551.28 : x
  2. Step 2: Convert to fraction form
    31,987.81/44,128.91 = 18,551.28/x
  3. Step 3: Cross multiply
    31,987.81x = 44,128.91 × 18,551.28
  4. Step 4: Simplify right side
    31,987.81x = 818,647,873.02
  5. Step 5: Solve for x
    x = 818,647,873.02/31,987.81
  6. Step 6: Final answer
    x = 25,592.49

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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.