Home / 14,420.72-21,583.96-7,830.48

Finding the Fourth Proportional to 14,420.72, 21,583.96 and 7,830.48

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Solution

The fourth proportional to 14,420.72, 21,583.96 and 7,830.48 is: 11,720.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,420.72 : 21,583.96 = 7,830.48 : x
  2. Step 2: Convert to fraction form
    14,420.72/21,583.96 = 7,830.48/x
  3. Step 3: Cross multiply
    14,420.72x = 21,583.96 × 7,830.48
  4. Step 4: Simplify right side
    14,420.72x = 169,012,767.10
  5. Step 5: Solve for x
    x = 169,012,767.10/14,420.72
  6. Step 6: Final answer
    x = 11,720.13

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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.