Home / 30,861.48-42,589.62-18,931.41

Finding the Fourth Proportional to 30,861.48, 42,589.62 and 18,931.41

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Solution

The fourth proportional to 30,861.48, 42,589.62 and 18,931.41 is: 26,125.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,861.48 : 42,589.62 = 18,931.41 : x
  2. Step 2: Convert to fraction form
    30,861.48/42,589.62 = 18,931.41/x
  3. Step 3: Cross multiply
    30,861.48x = 42,589.62 × 18,931.41
  4. Step 4: Simplify right side
    30,861.48x = 806,281,557.96
  5. Step 5: Solve for x
    x = 806,281,557.96/30,861.48
  6. Step 6: Final answer
    x = 26,125.82

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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.