Home / 20,385.20-30,577.80-14,164.40

Finding the Fourth Proportional to 20,385.20, 30,577.80 and 14,164.40

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Solution

The fourth proportional to 20,385.20, 30,577.80 and 14,164.40 is: 21,246.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.20 : 30,577.80 = 14,164.40 : x
  2. Step 2: Convert to fraction form
    20,385.20/30,577.80 = 14,164.40/x
  3. Step 3: Cross multiply
    20,385.20x = 30,577.80 × 14,164.40
  4. Step 4: Simplify right side
    20,385.20x = 433,116,190.32
  5. Step 5: Solve for x
    x = 433,116,190.32/20,385.20
  6. Step 6: Final answer
    x = 21,246.60

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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.