Home / 25,671.48-35,403.62-21,378.79

Finding the Fourth Proportional to 25,671.48, 35,403.62 and 21,378.79

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Solution

The fourth proportional to 25,671.48, 35,403.62 and 21,378.79 is: 29,483.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,671.48 : 35,403.62 = 21,378.79 : x
  2. Step 2: Convert to fraction form
    25,671.48/35,403.62 = 21,378.79/x
  3. Step 3: Cross multiply
    25,671.48x = 35,403.62 × 21,378.79
  4. Step 4: Simplify right side
    25,671.48x = 756,886,415.69
  5. Step 5: Solve for x
    x = 756,886,415.69/25,671.48
  6. Step 6: Final answer
    x = 29,483.55

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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.