Home / 13,419.99-18,526.32-8,387.01

Finding the Fourth Proportional to 13,419.99, 18,526.32 and 8,387.01

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Solution

The fourth proportional to 13,419.99, 18,526.32 and 8,387.01 is: 11,578.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,419.99 : 18,526.32 = 8,387.01 : x
  2. Step 2: Convert to fraction form
    13,419.99/18,526.32 = 8,387.01/x
  3. Step 3: Cross multiply
    13,419.99x = 18,526.32 × 8,387.01
  4. Step 4: Simplify right side
    13,419.99x = 155,380,431.10
  5. Step 5: Solve for x
    x = 155,380,431.10/13,419.99
  6. Step 6: Final answer
    x = 11,578.28

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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.