Home / 31,878.68-43,974.60-19,128.47

Finding the Fourth Proportional to 31,878.68, 43,974.60 and 19,128.47

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Solution

The fourth proportional to 31,878.68, 43,974.60 and 19,128.47 is: 26,386.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,878.68 : 43,974.60 = 19,128.47 : x
  2. Step 2: Convert to fraction form
    31,878.68/43,974.60 = 19,128.47/x
  3. Step 3: Cross multiply
    31,878.68x = 43,974.60 × 19,128.47
  4. Step 4: Simplify right side
    31,878.68x = 841,166,816.86
  5. Step 5: Solve for x
    x = 841,166,816.86/31,878.68
  6. Step 6: Final answer
    x = 26,386.50

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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.