Home / 30,840.11-42,560.13-18,910.02

Finding the Fourth Proportional to 30,840.11, 42,560.13 and 18,910.02

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Solution

The fourth proportional to 30,840.11, 42,560.13 and 18,910.02 is: 26,096.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,840.11 : 42,560.13 = 18,910.02 : x
  2. Step 2: Convert to fraction form
    30,840.11/42,560.13 = 18,910.02/x
  3. Step 3: Cross multiply
    30,840.11x = 42,560.13 × 18,910.02
  4. Step 4: Simplify right side
    30,840.11x = 804,812,909.50
  5. Step 5: Solve for x
    x = 804,812,909.50/30,840.11
  6. Step 6: Final answer
    x = 26,096.31

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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.