Home / 21,178.32-31,727.38-14,137.10

Finding the Fourth Proportional to 21,178.32, 31,727.38 and 14,137.10

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Solution

The fourth proportional to 21,178.32, 31,727.38 and 14,137.10 is: 21,178.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.32 : 31,727.38 = 14,137.10 : x
  2. Step 2: Convert to fraction form
    21,178.32/31,727.38 = 14,137.10/x
  3. Step 3: Cross multiply
    21,178.32x = 31,727.38 × 14,137.10
  4. Step 4: Simplify right side
    21,178.32x = 448,533,143.80
  5. Step 5: Solve for x
    x = 448,533,143.80/21,178.32
  6. Step 6: Final answer
    x = 21,178.88

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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.