Home / 28,583.40-42,923.70-21,196.20

Finding the Fourth Proportional to 28,583.40, 42,923.70 and 21,196.20

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Solution

The fourth proportional to 28,583.40, 42,923.70 and 21,196.20 is: 31,830.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,583.40 : 42,923.70 = 21,196.20 : x
  2. Step 2: Convert to fraction form
    28,583.40/42,923.70 = 21,196.20/x
  3. Step 3: Cross multiply
    28,583.40x = 42,923.70 × 21,196.20
  4. Step 4: Simplify right side
    28,583.40x = 909,819,329.94
  5. Step 5: Solve for x
    x = 909,819,329.94/28,583.40
  6. Step 6: Final answer
    x = 31,830.34

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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.