Home / 28,219.41-42,246.05-20,856.69

Finding the Fourth Proportional to 28,219.41, 42,246.05 and 20,856.69

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Solution

The fourth proportional to 28,219.41, 42,246.05 and 20,856.69 is: 31,223.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,219.41 : 42,246.05 = 20,856.69 : x
  2. Step 2: Convert to fraction form
    28,219.41/42,246.05 = 20,856.69/x
  3. Step 3: Cross multiply
    28,219.41x = 42,246.05 × 20,856.69
  4. Step 4: Simplify right side
    28,219.41x = 881,112,664.29
  5. Step 5: Solve for x
    x = 881,112,664.29/28,219.41
  6. Step 6: Final answer
    x = 31,223.64

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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.