Home / 30,840.61-42,561.07-18,901.64

Finding the Fourth Proportional to 30,840.61, 42,561.07 and 18,901.64

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Solution

The fourth proportional to 30,840.61, 42,561.07 and 18,901.64 is: 26,084.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,840.61 : 42,561.07 = 18,901.64 : x
  2. Step 2: Convert to fraction form
    30,840.61/42,561.07 = 18,901.64/x
  3. Step 3: Cross multiply
    30,840.61x = 42,561.07 × 18,901.64
  4. Step 4: Simplify right side
    30,840.61x = 804,474,023.15
  5. Step 5: Solve for x
    x = 804,474,023.15/30,840.61
  6. Step 6: Final answer
    x = 26,084.89

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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.