Home / 39,143.20-54,015.71-21,237.74

Finding the Fourth Proportional to 39,143.20, 54,015.71 and 21,237.74

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Solution

The fourth proportional to 39,143.20, 54,015.71 and 21,237.74 is: 29,307.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,143.20 : 54,015.71 = 21,237.74 : x
  2. Step 2: Convert to fraction form
    39,143.20/54,015.71 = 21,237.74/x
  3. Step 3: Cross multiply
    39,143.20x = 54,015.71 × 21,237.74
  4. Step 4: Simplify right side
    39,143.20x = 1,147,171,854.49
  5. Step 5: Solve for x
    x = 1,147,171,854.49/39,143.20
  6. Step 6: Final answer
    x = 29,307.05

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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.