Home / 30,690.77-42,353.70-18,115.52

Finding the Fourth Proportional to 30,690.77, 42,353.70 and 18,115.52

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Solution

The fourth proportional to 30,690.77, 42,353.70 and 18,115.52 is: 24,999.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,690.77 : 42,353.70 = 18,115.52 : x
  2. Step 2: Convert to fraction form
    30,690.77/42,353.70 = 18,115.52/x
  3. Step 3: Cross multiply
    30,690.77x = 42,353.70 × 18,115.52
  4. Step 4: Simplify right side
    30,690.77x = 767,259,299.42
  5. Step 5: Solve for x
    x = 767,259,299.42/30,690.77
  6. Step 6: Final answer
    x = 24,999.68

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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.