Home / 20,678.28-31,014.84-6,637.20

Finding the Fourth Proportional to 20,678.28, 31,014.84 and 6,637.20

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Solution

The fourth proportional to 20,678.28, 31,014.84 and 6,637.20 is: 9,954.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.28 : 31,014.84 = 6,637.20 : x
  2. Step 2: Convert to fraction form
    20,678.28/31,014.84 = 6,637.20/x
  3. Step 3: Cross multiply
    20,678.28x = 31,014.84 × 6,637.20
  4. Step 4: Simplify right side
    20,678.28x = 205,851,696.05
  5. Step 5: Solve for x
    x = 205,851,696.05/20,678.28
  6. Step 6: Final answer
    x = 9,954.97

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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.