Home / 20,931.05-28,885.37-11,370.94

Finding the Fourth Proportional to 20,931.05, 28,885.37 and 11,370.94

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Solution

The fourth proportional to 20,931.05, 28,885.37 and 11,370.94 is: 15,692.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.05 : 28,885.37 = 11,370.94 : x
  2. Step 2: Convert to fraction form
    20,931.05/28,885.37 = 11,370.94/x
  3. Step 3: Cross multiply
    20,931.05x = 28,885.37 × 11,370.94
  4. Step 4: Simplify right side
    20,931.05x = 328,453,607.87
  5. Step 5: Solve for x
    x = 328,453,607.87/20,931.05
  6. Step 6: Final answer
    x = 15,692.17

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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.