Home / 31,063.32-42,817.44-20,988.60

Finding the Fourth Proportional to 31,063.32, 42,817.44 and 20,988.60

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Solution

The fourth proportional to 31,063.32, 42,817.44 and 20,988.60 is: 28,930.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,063.32 : 42,817.44 = 20,988.60 : x
  2. Step 2: Convert to fraction form
    31,063.32/42,817.44 = 20,988.60/x
  3. Step 3: Cross multiply
    31,063.32x = 42,817.44 × 20,988.60
  4. Step 4: Simplify right side
    31,063.32x = 898,678,121.18
  5. Step 5: Solve for x
    x = 898,678,121.18/31,063.32
  6. Step 6: Final answer
    x = 28,930.52

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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.