Home / 20,685.40-31,028.28-5,894.30

Finding the Fourth Proportional to 20,685.40, 31,028.28 and 5,894.30

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Solution

The fourth proportional to 20,685.40, 31,028.28 and 5,894.30 is: 8,841.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.40 : 31,028.28 = 5,894.30 : x
  2. Step 2: Convert to fraction form
    20,685.40/31,028.28 = 5,894.30/x
  3. Step 3: Cross multiply
    20,685.40x = 31,028.28 × 5,894.30
  4. Step 4: Simplify right side
    20,685.40x = 182,889,990.80
  5. Step 5: Solve for x
    x = 182,889,990.80/20,685.40
  6. Step 6: Final answer
    x = 8,841.50

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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.