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Finding the Fourth Proportional to 15,693.55, 21,660.55 and 10,855.08

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Solution

The fourth proportional to 15,693.55, 21,660.55 and 10,855.08 is: 14,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693.55 : 21,660.55 = 10,855.08 : x
  2. Step 2: Convert to fraction form
    15,693.55/21,660.55 = 10,855.08/x
  3. Step 3: Cross multiply
    15,693.55x = 21,660.55 × 10,855.08
  4. Step 4: Simplify right side
    15,693.55x = 235,126,975.96
  5. Step 5: Solve for x
    x = 235,126,975.96/15,693.55
  6. Step 6: Final answer
    x = 14,982.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.