Home / 28,290.70-42,395.81-20,836.54

Finding the Fourth Proportional to 28,290.70, 42,395.81 and 20,836.54

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Solution

The fourth proportional to 28,290.70, 42,395.81 and 20,836.54 is: 31,225.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.70 : 42,395.81 = 20,836.54 : x
  2. Step 2: Convert to fraction form
    28,290.70/42,395.81 = 20,836.54/x
  3. Step 3: Cross multiply
    28,290.70x = 42,395.81 × 20,836.54
  4. Step 4: Simplify right side
    28,290.70x = 883,381,778.92
  5. Step 5: Solve for x
    x = 883,381,778.92/28,290.70
  6. Step 6: Final answer
    x = 31,225.17

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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.