Home / 21,829.40-30,124.61-12,397.96

Finding the Fourth Proportional to 21,829.40, 30,124.61 and 12,397.96

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Solution

The fourth proportional to 21,829.40, 30,124.61 and 12,397.96 is: 17,109.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,829.40 : 30,124.61 = 12,397.96 : x
  2. Step 2: Convert to fraction form
    21,829.40/30,124.61 = 12,397.96/x
  3. Step 3: Cross multiply
    21,829.40x = 30,124.61 × 12,397.96
  4. Step 4: Simplify right side
    21,829.40x = 373,483,709.80
  5. Step 5: Solve for x
    x = 373,483,709.80/21,829.40
  6. Step 6: Final answer
    x = 17,109.21

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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.