Home / 28,581.40-42,920.70-21,194.20

Finding the Fourth Proportional to 28,581.40, 42,920.70 and 21,194.20

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Solution

The fourth proportional to 28,581.40, 42,920.70 and 21,194.20 is: 31,827.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,581.40 : 42,920.70 = 21,194.20 : x
  2. Step 2: Convert to fraction form
    28,581.40/42,920.70 = 21,194.20/x
  3. Step 3: Cross multiply
    28,581.40x = 42,920.70 × 21,194.20
  4. Step 4: Simplify right side
    28,581.40x = 909,669,899.94
  5. Step 5: Solve for x
    x = 909,669,899.94/28,581.40
  6. Step 6: Final answer
    x = 31,827.34

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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.