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Finding the Fourth Proportional to 12,980.10, 19,460.55 and 8,809.70

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Solution

The fourth proportional to 12,980.10, 19,460.55 and 8,809.70 is: 13,208.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980.10 : 19,460.55 = 8,809.70 : x
  2. Step 2: Convert to fraction form
    12,980.10/19,460.55 = 8,809.70/x
  3. Step 3: Cross multiply
    12,980.10x = 19,460.55 × 8,809.70
  4. Step 4: Simplify right side
    12,980.10x = 171,441,607.34
  5. Step 5: Solve for x
    x = 171,441,607.34/12,980.10
  6. Step 6: Final answer
    x = 13,208.03

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1.5x scale

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.