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Finding the Fourth Proportional to 21,393.40, 32,003.70 and 18,503.80

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Solution

The fourth proportional to 21,393.40, 32,003.70 and 18,503.80 is: 27,680.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,393.40 : 32,003.70 = 18,503.80 : x
  2. Step 2: Convert to fraction form
    21,393.40/32,003.70 = 18,503.80/x
  3. Step 3: Cross multiply
    21,393.40x = 32,003.70 × 18,503.80
  4. Step 4: Simplify right side
    21,393.40x = 592,190,064.06
  5. Step 5: Solve for x
    x = 592,190,064.06/21,393.40
  6. Step 6: Final answer
    x = 27,680.97

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1.5x scale

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.