Home / 38,415.96-53,017.20-21,417.90

Finding the Fourth Proportional to 38,415.96, 53,017.20 and 21,417.90

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Solution

The fourth proportional to 38,415.96, 53,017.20 and 21,417.90 is: 29,558.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,415.96 : 53,017.20 = 21,417.90 : x
  2. Step 2: Convert to fraction form
    38,415.96/53,017.20 = 21,417.90/x
  3. Step 3: Cross multiply
    38,415.96x = 53,017.20 × 21,417.90
  4. Step 4: Simplify right side
    38,415.96x = 1,135,517,087.88
  5. Step 5: Solve for x
    x = 1,135,517,087.88/38,415.96
  6. Step 6: Final answer
    x = 29,558.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.