Home / 15,019.56-20,720.10-9,716.09

Finding the Fourth Proportional to 15,019.56, 20,720.10 and 9,716.09

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Solution

The fourth proportional to 15,019.56, 20,720.10 and 9,716.09 is: 13,403.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,019.56 : 20,720.10 = 9,716.09 : x
  2. Step 2: Convert to fraction form
    15,019.56/20,720.10 = 9,716.09/x
  3. Step 3: Cross multiply
    15,019.56x = 20,720.10 × 9,716.09
  4. Step 4: Simplify right side
    15,019.56x = 201,318,289.24
  5. Step 5: Solve for x
    x = 201,318,289.24/15,019.56
  6. Step 6: Final answer
    x = 13,403.74

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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.