Home / 12,989.92-19,482.96-4,780

Finding the Fourth Proportional to 12,989.92, 19,482.96 and 4,780

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Solution

The fourth proportional to 12,989.92, 19,482.96 and 4,780 is: 7,169.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.92 : 19,482.96 = 4,780 : x
  2. Step 2: Convert to fraction form
    12,989.92/19,482.96 = 4,780/x
  3. Step 3: Cross multiply
    12,989.92x = 19,482.96 × 4,780
  4. Step 4: Simplify right side
    12,989.92x = 93,128,548.80
  5. Step 5: Solve for x
    x = 93,128,548.80/12,989.92
  6. Step 6: Final answer
    x = 7,169.29

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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.