Home / 12,665.81-18,999.09-4,345.71

Finding the Fourth Proportional to 12,665.81, 18,999.09 and 4,345.71

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Solution

The fourth proportional to 12,665.81, 18,999.09 and 4,345.71 is: 6,518.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,665.81 : 18,999.09 = 4,345.71 : x
  2. Step 2: Convert to fraction form
    12,665.81/18,999.09 = 4,345.71/x
  3. Step 3: Cross multiply
    12,665.81x = 18,999.09 × 4,345.71
  4. Step 4: Simplify right side
    12,665.81x = 82,564,451.27
  5. Step 5: Solve for x
    x = 82,564,451.27/12,665.81
  6. Step 6: Final answer
    x = 6,518.69

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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.