Home / 21,853.40-30,157.56-12,423.80

Finding the Fourth Proportional to 21,853.40, 30,157.56 and 12,423.80

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Solution

The fourth proportional to 21,853.40, 30,157.56 and 12,423.80 is: 17,144.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,853.40 : 30,157.56 = 12,423.80 : x
  2. Step 2: Convert to fraction form
    21,853.40/30,157.56 = 12,423.80/x
  3. Step 3: Cross multiply
    21,853.40x = 30,157.56 × 12,423.80
  4. Step 4: Simplify right side
    21,853.40x = 374,671,493.93
  5. Step 5: Solve for x
    x = 374,671,493.93/21,853.40
  6. Step 6: Final answer
    x = 17,144.77

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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.