Home / 12,810.78-19,221.30-6,235.20

Finding the Fourth Proportional to 12,810.78, 19,221.30 and 6,235.20

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Solution

The fourth proportional to 12,810.78, 19,221.30 and 6,235.20 is: 9,355.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,810.78 : 19,221.30 = 6,235.20 : x
  2. Step 2: Convert to fraction form
    12,810.78/19,221.30 = 6,235.20/x
  3. Step 3: Cross multiply
    12,810.78x = 19,221.30 × 6,235.20
  4. Step 4: Simplify right side
    12,810.78x = 119,848,649.76
  5. Step 5: Solve for x
    x = 119,848,649.76/12,810.78
  6. Step 6: Final answer
    x = 9,355.30

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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.