Home / 31,128.40-42,956.68-16,981.24

Finding the Fourth Proportional to 31,128.40, 42,956.68 and 16,981.24

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Solution

The fourth proportional to 31,128.40, 42,956.68 and 16,981.24 is: 23,433.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,128.40 : 42,956.68 = 16,981.24 : x
  2. Step 2: Convert to fraction form
    31,128.40/42,956.68 = 16,981.24/x
  3. Step 3: Cross multiply
    31,128.40x = 42,956.68 × 16,981.24
  4. Step 4: Simplify right side
    31,128.40x = 729,457,692.68
  5. Step 5: Solve for x
    x = 729,457,692.68/31,128.40
  6. Step 6: Final answer
    x = 23,433.83

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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.