Home / 21,430.81-29,577.05-11,997.55

Finding the Fourth Proportional to 21,430.81, 29,577.05 and 11,997.55

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Solution

The fourth proportional to 21,430.81, 29,577.05 and 11,997.55 is: 16,558.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.81 : 29,577.05 = 11,997.55 : x
  2. Step 2: Convert to fraction form
    21,430.81/29,577.05 = 11,997.55/x
  3. Step 3: Cross multiply
    21,430.81x = 29,577.05 × 11,997.55
  4. Step 4: Simplify right side
    21,430.81x = 354,852,136.23
  5. Step 5: Solve for x
    x = 354,852,136.23/21,430.81
  6. Step 6: Final answer
    x = 16,558.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.