Home / 20,878.48-28,809.96-12,925.84

Finding the Fourth Proportional to 20,878.48, 28,809.96 and 12,925.84

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Solution

The fourth proportional to 20,878.48, 28,809.96 and 12,925.84 is: 17,836.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.48 : 28,809.96 = 12,925.84 : x
  2. Step 2: Convert to fraction form
    20,878.48/28,809.96 = 12,925.84/x
  3. Step 3: Cross multiply
    20,878.48x = 28,809.96 × 12,925.84
  4. Step 4: Simplify right side
    20,878.48x = 372,392,933.37
  5. Step 5: Solve for x
    x = 372,392,933.37/20,878.48
  6. Step 6: Final answer
    x = 17,836.21

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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.