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Finding the Fourth Proportional to 14,653.80, 21,980.70 and 14,135.40

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Solution

The fourth proportional to 14,653.80, 21,980.70 and 14,135.40 is: 21,203.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,653.80 : 21,980.70 = 14,135.40 : x
  2. Step 2: Convert to fraction form
    14,653.80/21,980.70 = 14,135.40/x
  3. Step 3: Cross multiply
    14,653.80x = 21,980.70 × 14,135.40
  4. Step 4: Simplify right side
    14,653.80x = 310,705,986.78
  5. Step 5: Solve for x
    x = 310,705,986.78/14,653.80
  6. Step 6: Final answer
    x = 21,203.10

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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.