Home / 30,867.19-42,591.10-18,120.93

Finding the Fourth Proportional to 30,867.19, 42,591.10 and 18,120.93

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Solution

The fourth proportional to 30,867.19, 42,591.10 and 18,120.93 is: 25,003.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,867.19 : 42,591.10 = 18,120.93 : x
  2. Step 2: Convert to fraction form
    30,867.19/42,591.10 = 18,120.93/x
  3. Step 3: Cross multiply
    30,867.19x = 42,591.10 × 18,120.93
  4. Step 4: Simplify right side
    30,867.19x = 771,790,341.72
  5. Step 5: Solve for x
    x = 771,790,341.72/30,867.19
  6. Step 6: Final answer
    x = 25,003.58

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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.