Home / 38,918.79-58,386.39-12,621.49

Finding the Fourth Proportional to 38,918.79, 58,386.39 and 12,621.49

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Solution

The fourth proportional to 38,918.79, 58,386.39 and 12,621.49 is: 18,934.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,918.79 : 58,386.39 = 12,621.49 : x
  2. Step 2: Convert to fraction form
    38,918.79/58,386.39 = 12,621.49/x
  3. Step 3: Cross multiply
    38,918.79x = 58,386.39 × 12,621.49
  4. Step 4: Simplify right side
    38,918.79x = 736,922,945.59
  5. Step 5: Solve for x
    x = 736,922,945.59/38,918.79
  6. Step 6: Final answer
    x = 18,934.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.