Home / 9,419.80-12,999.28-5,228.08

Finding the Fourth Proportional to 9,419.80, 12,999.28 and 5,228.08

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Solution

The fourth proportional to 9,419.80, 12,999.28 and 5,228.08 is: 7,214.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,419.80 : 12,999.28 = 5,228.08 : x
  2. Step 2: Convert to fraction form
    9,419.80/12,999.28 = 5,228.08/x
  3. Step 3: Cross multiply
    9,419.80x = 12,999.28 × 5,228.08
  4. Step 4: Simplify right side
    9,419.80x = 67,961,275.78
  5. Step 5: Solve for x
    x = 67,961,275.78/9,419.80
  6. Step 6: Final answer
    x = 7,214.73

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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.