Home / 19,639.38-29,458.38-6,491.40

Finding the Fourth Proportional to 19,639.38, 29,458.38 and 6,491.40

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Solution

The fourth proportional to 19,639.38, 29,458.38 and 6,491.40 is: 9,736.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,639.38 : 29,458.38 = 6,491.40 : x
  2. Step 2: Convert to fraction form
    19,639.38/29,458.38 = 6,491.40/x
  3. Step 3: Cross multiply
    19,639.38x = 29,458.38 × 6,491.40
  4. Step 4: Simplify right side
    19,639.38x = 191,226,127.93
  5. Step 5: Solve for x
    x = 191,226,127.93/19,639.38
  6. Step 6: Final answer
    x = 9,736.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.