Home / 25,420.64-38,136.06-8,781.28

Finding the Fourth Proportional to 25,420.64, 38,136.06 and 8,781.28

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Solution

The fourth proportional to 25,420.64, 38,136.06 and 8,781.28 is: 13,173.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,420.64 : 38,136.06 = 8,781.28 : x
  2. Step 2: Convert to fraction form
    25,420.64/38,136.06 = 8,781.28/x
  3. Step 3: Cross multiply
    25,420.64x = 38,136.06 × 8,781.28
  4. Step 4: Simplify right side
    25,420.64x = 334,883,420.96
  5. Step 5: Solve for x
    x = 334,883,420.96/25,420.64
  6. Step 6: Final answer
    x = 13,173.68

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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.