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Finding the Fourth Proportional to 13,693.59, 20,555.51 and 9,815.31

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Solution

The fourth proportional to 13,693.59, 20,555.51 and 9,815.31 is: 14,733.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,693.59 : 20,555.51 = 9,815.31 : x
  2. Step 2: Convert to fraction form
    13,693.59/20,555.51 = 9,815.31/x
  3. Step 3: Cross multiply
    13,693.59x = 20,555.51 × 9,815.31
  4. Step 4: Simplify right side
    13,693.59x = 201,758,653.78
  5. Step 5: Solve for x
    x = 201,758,653.78/13,693.59
  6. Step 6: Final answer
    x = 14,733.80

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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.