Home / 30,810.12-42,520.86-18,236.76

Finding the Fourth Proportional to 30,810.12, 42,520.86 and 18,236.76

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Solution

The fourth proportional to 30,810.12, 42,520.86 and 18,236.76 is: 25,168.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,810.12 : 42,520.86 = 18,236.76 : x
  2. Step 2: Convert to fraction form
    30,810.12/42,520.86 = 18,236.76/x
  3. Step 3: Cross multiply
    30,810.12x = 42,520.86 × 18,236.76
  4. Step 4: Simplify right side
    30,810.12x = 775,442,718.81
  5. Step 5: Solve for x
    x = 775,442,718.81/30,810.12
  6. Step 6: Final answer
    x = 25,168.44

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Half scale
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Double scale
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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.