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Finding the Fourth Proportional to 14,155.18, 21,242.02 and 5,390.18

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Solution

The fourth proportional to 14,155.18, 21,242.02 and 5,390.18 is: 8,088.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,155.18 : 21,242.02 = 5,390.18 : x
  2. Step 2: Convert to fraction form
    14,155.18/21,242.02 = 5,390.18/x
  3. Step 3: Cross multiply
    14,155.18x = 21,242.02 × 5,390.18
  4. Step 4: Simplify right side
    14,155.18x = 114,498,311.36
  5. Step 5: Solve for x
    x = 114,498,311.36/14,155.18
  6. Step 6: Final answer
    x = 8,088.79

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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.