Home / 20,278.60-28,077.78-18,723.40

Finding the Fourth Proportional to 20,278.60, 28,077.78 and 18,723.40

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Solution

The fourth proportional to 20,278.60, 28,077.78 and 18,723.40 is: 25,924.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.60 : 28,077.78 = 18,723.40 : x
  2. Step 2: Convert to fraction form
    20,278.60/28,077.78 = 18,723.40/x
  3. Step 3: Cross multiply
    20,278.60x = 28,077.78 × 18,723.40
  4. Step 4: Simplify right side
    20,278.60x = 525,711,506.05
  5. Step 5: Solve for x
    x = 525,711,506.05/20,278.60
  6. Step 6: Final answer
    x = 25,924.45

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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.