Home / 9,405.32-12,979.95-5,426.70

Finding the Fourth Proportional to 9,405.32, 12,979.95 and 5,426.70

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Solution

The fourth proportional to 9,405.32, 12,979.95 and 5,426.70 is: 7,489.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,405.32 : 12,979.95 = 5,426.70 : x
  2. Step 2: Convert to fraction form
    9,405.32/12,979.95 = 5,426.70/x
  3. Step 3: Cross multiply
    9,405.32x = 12,979.95 × 5,426.70
  4. Step 4: Simplify right side
    9,405.32x = 70,438,225.64
  5. Step 5: Solve for x
    x = 70,438,225.64/9,405.32
  6. Step 6: Final answer
    x = 7,489.19

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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.