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Finding the Fourth Proportional to 14,295.80, 21,443.70 and 13,931.30

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Solution

The fourth proportional to 14,295.80, 21,443.70 and 13,931.30 is: 20,896.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,295.80 : 21,443.70 = 13,931.30 : x
  2. Step 2: Convert to fraction form
    14,295.80/21,443.70 = 13,931.30/x
  3. Step 3: Cross multiply
    14,295.80x = 21,443.70 × 13,931.30
  4. Step 4: Simplify right side
    14,295.80x = 298,738,617.81
  5. Step 5: Solve for x
    x = 298,738,617.81/14,295.80
  6. Step 6: Final answer
    x = 20,896.95

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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.