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Finding the Fourth Proportional to 7,477.80, 11,224.80 and 4,707.60

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Solution

The fourth proportional to 7,477.80, 11,224.80 and 4,707.60 is: 7,066.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,477.80 : 11,224.80 = 4,707.60 : x
  2. Step 2: Convert to fraction form
    7,477.80/11,224.80 = 4,707.60/x
  3. Step 3: Cross multiply
    7,477.80x = 11,224.80 × 4,707.60
  4. Step 4: Simplify right side
    7,477.80x = 52,841,868.48
  5. Step 5: Solve for x
    x = 52,841,868.48/7,477.80
  6. Step 6: Final answer
    x = 7,066.50

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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.