Home / 9,895.21-13,655.39-5,419.05

Finding the Fourth Proportional to 9,895.21, 13,655.39 and 5,419.05

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Solution

The fourth proportional to 9,895.21, 13,655.39 and 5,419.05 is: 7,478.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,895.21 : 13,655.39 = 5,419.05 : x
  2. Step 2: Convert to fraction form
    9,895.21/13,655.39 = 5,419.05/x
  3. Step 3: Cross multiply
    9,895.21x = 13,655.39 × 5,419.05
  4. Step 4: Simplify right side
    9,895.21x = 73,999,145.81
  5. Step 5: Solve for x
    x = 73,999,145.81/9,895.21
  6. Step 6: Final answer
    x = 7,478.28

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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.