Home / 21,181.68-29,228.55-12,683.60

Finding the Fourth Proportional to 21,181.68, 29,228.55 and 12,683.60

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Solution

The fourth proportional to 21,181.68, 29,228.55 and 12,683.60 is: 17,502.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.68 : 29,228.55 = 12,683.60 : x
  2. Step 2: Convert to fraction form
    21,181.68/29,228.55 = 12,683.60/x
  3. Step 3: Cross multiply
    21,181.68x = 29,228.55 × 12,683.60
  4. Step 4: Simplify right side
    21,181.68x = 370,723,200.24
  5. Step 5: Solve for x
    x = 370,723,200.24/21,181.68
  6. Step 6: Final answer
    x = 17,502.06

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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.