Home / 9,129.28-12,596.40-7,007.20

Finding the Fourth Proportional to 9,129.28, 12,596.40 and 7,007.20

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Solution

The fourth proportional to 9,129.28, 12,596.40 and 7,007.20 is: 9,668.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129.28 : 12,596.40 = 7,007.20 : x
  2. Step 2: Convert to fraction form
    9,129.28/12,596.40 = 7,007.20/x
  3. Step 3: Cross multiply
    9,129.28x = 12,596.40 × 7,007.20
  4. Step 4: Simplify right side
    9,129.28x = 88,265,494.08
  5. Step 5: Solve for x
    x = 88,265,494.08/9,129.28
  6. Step 6: Final answer
    x = 9,668.40

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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.