Home / 20,663.60-30,995.40-12,876.80

Finding the Fourth Proportional to 20,663.60, 30,995.40 and 12,876.80

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Solution

The fourth proportional to 20,663.60, 30,995.40 and 12,876.80 is: 19,315.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.60 : 30,995.40 = 12,876.80 : x
  2. Step 2: Convert to fraction form
    20,663.60/30,995.40 = 12,876.80/x
  3. Step 3: Cross multiply
    20,663.60x = 30,995.40 × 12,876.80
  4. Step 4: Simplify right side
    20,663.60x = 399,121,566.72
  5. Step 5: Solve for x
    x = 399,121,566.72/20,663.60
  6. Step 6: Final answer
    x = 19,315.20

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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.