Home / 20,875.86-31,313.79-5,293.08

Finding the Fourth Proportional to 20,875.86, 31,313.79 and 5,293.08

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Solution

The fourth proportional to 20,875.86, 31,313.79 and 5,293.08 is: 7,939.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.86 : 31,313.79 = 5,293.08 : x
  2. Step 2: Convert to fraction form
    20,875.86/31,313.79 = 5,293.08/x
  3. Step 3: Cross multiply
    20,875.86x = 31,313.79 × 5,293.08
  4. Step 4: Simplify right side
    20,875.86x = 165,746,395.57
  5. Step 5: Solve for x
    x = 165,746,395.57/20,875.86
  6. Step 6: Final answer
    x = 7,939.62

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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.