Home / 6,624.64-9,141.68-3,970.72

Finding the Fourth Proportional to 6,624.64, 9,141.68 and 3,970.72

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Solution

The fourth proportional to 6,624.64, 9,141.68 and 3,970.72 is: 5,479.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,624.64 : 9,141.68 = 3,970.72 : x
  2. Step 2: Convert to fraction form
    6,624.64/9,141.68 = 3,970.72/x
  3. Step 3: Cross multiply
    6,624.64x = 9,141.68 × 3,970.72
  4. Step 4: Simplify right side
    6,624.64x = 36,299,051.61
  5. Step 5: Solve for x
    x = 36,299,051.61/6,624.64
  6. Step 6: Final answer
    x = 5,479.40

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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.