Home / 11,320.83-16,981.21-9,639.30

Finding the Fourth Proportional to 11,320.83, 16,981.21 and 9,639.30

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Solution

The fourth proportional to 11,320.83, 16,981.21 and 9,639.30 is: 14,458.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,320.83 : 16,981.21 = 9,639.30 : x
  2. Step 2: Convert to fraction form
    11,320.83/16,981.21 = 9,639.30/x
  3. Step 3: Cross multiply
    11,320.83x = 16,981.21 × 9,639.30
  4. Step 4: Simplify right side
    11,320.83x = 163,686,977.55
  5. Step 5: Solve for x
    x = 163,686,977.55/11,320.83
  6. Step 6: Final answer
    x = 14,458.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.