Home / 9,399.12-12,970.80-5,207.28

Finding the Fourth Proportional to 9,399.12, 12,970.80 and 5,207.28

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Solution

The fourth proportional to 9,399.12, 12,970.80 and 5,207.28 is: 7,186.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,399.12 : 12,970.80 = 5,207.28 : x
  2. Step 2: Convert to fraction form
    9,399.12/12,970.80 = 5,207.28/x
  3. Step 3: Cross multiply
    9,399.12x = 12,970.80 × 5,207.28
  4. Step 4: Simplify right side
    9,399.12x = 67,542,587.42
  5. Step 5: Solve for x
    x = 67,542,587.42/9,399.12
  6. Step 6: Final answer
    x = 7,186.05

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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.