Home / 8,721.92-12,036-4,945.45

Finding the Fourth Proportional to 8,721.92, 12,036 and 4,945.45

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Solution

The fourth proportional to 8,721.92, 12,036 and 4,945.45 is: 6,824.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.92 : 12,036 = 4,945.45 : x
  2. Step 2: Convert to fraction form
    8,721.92/12,036 = 4,945.45/x
  3. Step 3: Cross multiply
    8,721.92x = 12,036 × 4,945.45
  4. Step 4: Simplify right side
    8,721.92x = 59,523,406.11
  5. Step 5: Solve for x
    x = 59,523,406.11/8,721.92
  6. Step 6: Final answer
    x = 6,824.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.