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Finding the Fourth Proportional to 14,305.64, 21,455.18 and 3,918.20

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Solution

The fourth proportional to 14,305.64, 21,455.18 and 3,918.20 is: 5,876.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,305.64 : 21,455.18 = 3,918.20 : x
  2. Step 2: Convert to fraction form
    14,305.64/21,455.18 = 3,918.20/x
  3. Step 3: Cross multiply
    14,305.64x = 21,455.18 × 3,918.20
  4. Step 4: Simplify right side
    14,305.64x = 84,065,686.28
  5. Step 5: Solve for x
    x = 84,065,686.28/14,305.64
  6. Step 6: Final answer
    x = 5,876.40

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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.