Home / 31,878.74-43,998-18,447.68

Finding the Fourth Proportional to 31,878.74, 43,998 and 18,447.68

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Solution

The fourth proportional to 31,878.74, 43,998 and 18,447.68 is: 25,460.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,878.74 : 43,998 = 18,447.68 : x
  2. Step 2: Convert to fraction form
    31,878.74/43,998 = 18,447.68/x
  3. Step 3: Cross multiply
    31,878.74x = 43,998 × 18,447.68
  4. Step 4: Simplify right side
    31,878.74x = 811,661,024.64
  5. Step 5: Solve for x
    x = 811,661,024.64/31,878.74
  6. Step 6: Final answer
    x = 25,460.89

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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.