Home / 12,861.78-19,281.30-5,068.80

Finding the Fourth Proportional to 12,861.78, 19,281.30 and 5,068.80

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Solution

The fourth proportional to 12,861.78, 19,281.30 and 5,068.80 is: 7,598.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,861.78 : 19,281.30 = 5,068.80 : x
  2. Step 2: Convert to fraction form
    12,861.78/19,281.30 = 5,068.80/x
  3. Step 3: Cross multiply
    12,861.78x = 19,281.30 × 5,068.80
  4. Step 4: Simplify right side
    12,861.78x = 97,733,053.44
  5. Step 5: Solve for x
    x = 97,733,053.44/12,861.78
  6. Step 6: Final answer
    x = 7,598.72

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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.