Home / 30,327.78-45,477.90-12,788.04

Finding the Fourth Proportional to 30,327.78, 45,477.90 and 12,788.04

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Solution

The fourth proportional to 30,327.78, 45,477.90 and 12,788.04 is: 19,176.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,327.78 : 45,477.90 = 12,788.04 : x
  2. Step 2: Convert to fraction form
    30,327.78/45,477.90 = 12,788.04/x
  3. Step 3: Cross multiply
    30,327.78x = 45,477.90 × 12,788.04
  4. Step 4: Simplify right side
    30,327.78x = 581,573,204.32
  5. Step 5: Solve for x
    x = 581,573,204.32/30,327.78
  6. Step 6: Final answer
    x = 19,176.25

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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.