Home / 20,209.86-30,320.79-10,356.06

Finding the Fourth Proportional to 20,209.86, 30,320.79 and 10,356.06

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Solution

The fourth proportional to 20,209.86, 30,320.79 and 10,356.06 is: 15,537.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.86 : 30,320.79 = 10,356.06 : x
  2. Step 2: Convert to fraction form
    20,209.86/30,320.79 = 10,356.06/x
  3. Step 3: Cross multiply
    20,209.86x = 30,320.79 × 10,356.06
  4. Step 4: Simplify right side
    20,209.86x = 314,003,920.49
  5. Step 5: Solve for x
    x = 314,003,920.49/20,209.86
  6. Step 6: Final answer
    x = 15,537.16

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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.