Home / 28,220.40-42,339.42-16,988.04

Finding the Fourth Proportional to 28,220.40, 42,339.42 and 16,988.04

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Solution

The fourth proportional to 28,220.40, 42,339.42 and 16,988.04 is: 25,487.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220.40 : 42,339.42 = 16,988.04 : x
  2. Step 2: Convert to fraction form
    28,220.40/42,339.42 = 16,988.04/x
  3. Step 3: Cross multiply
    28,220.40x = 42,339.42 × 16,988.04
  4. Step 4: Simplify right side
    28,220.40x = 719,263,760.54
  5. Step 5: Solve for x
    x = 719,263,760.54/28,220.40
  6. Step 6: Final answer
    x = 25,487.37

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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.