Home / 20,423.98-28,178.40-11,924.20

Finding the Fourth Proportional to 20,423.98, 28,178.40 and 11,924.20

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Solution

The fourth proportional to 20,423.98, 28,178.40 and 11,924.20 is: 16,451.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.98 : 28,178.40 = 11,924.20 : x
  2. Step 2: Convert to fraction form
    20,423.98/28,178.40 = 11,924.20/x
  3. Step 3: Cross multiply
    20,423.98x = 28,178.40 × 11,924.20
  4. Step 4: Simplify right side
    20,423.98x = 336,004,877.28
  5. Step 5: Solve for x
    x = 336,004,877.28/20,423.98
  6. Step 6: Final answer
    x = 16,451.49

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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.