Home / 21,345.57-31,975.41-10,639.62

Finding the Fourth Proportional to 21,345.57, 31,975.41 and 10,639.62

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Solution

The fourth proportional to 21,345.57, 31,975.41 and 10,639.62 is: 15,938.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,345.57 : 31,975.41 = 10,639.62 : x
  2. Step 2: Convert to fraction form
    21,345.57/31,975.41 = 10,639.62/x
  3. Step 3: Cross multiply
    21,345.57x = 31,975.41 × 10,639.62
  4. Step 4: Simplify right side
    21,345.57x = 340,206,211.74
  5. Step 5: Solve for x
    x = 340,206,211.74/21,345.57
  6. Step 6: Final answer
    x = 15,938.02

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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.