Home / 21,802.50-30,090.96-12,376.80

Finding the Fourth Proportional to 21,802.50, 30,090.96 and 12,376.80

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Solution

The fourth proportional to 21,802.50, 30,090.96 and 12,376.80 is: 17,081.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,802.50 : 30,090.96 = 12,376.80 : x
  2. Step 2: Convert to fraction form
    21,802.50/30,090.96 = 12,376.80/x
  3. Step 3: Cross multiply
    21,802.50x = 30,090.96 × 12,376.80
  4. Step 4: Simplify right side
    21,802.50x = 372,429,793.73
  5. Step 5: Solve for x
    x = 372,429,793.73/21,802.50
  6. Step 6: Final answer
    x = 17,081.98

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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.