Home / 8,279.46-11,428.65-5,485.86

Finding the Fourth Proportional to 8,279.46, 11,428.65 and 5,485.86

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Solution

The fourth proportional to 8,279.46, 11,428.65 and 5,485.86 is: 7,572.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.46 : 11,428.65 = 5,485.86 : x
  2. Step 2: Convert to fraction form
    8,279.46/11,428.65 = 5,485.86/x
  3. Step 3: Cross multiply
    8,279.46x = 11,428.65 × 5,485.86
  4. Step 4: Simplify right side
    8,279.46x = 62,695,973.89
  5. Step 5: Solve for x
    x = 62,695,973.89/8,279.46
  6. Step 6: Final answer
    x = 7,572.47

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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.