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Finding the Fourth Proportional to 7,200.77, 9,938.80 and 4,810.86

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Solution

The fourth proportional to 7,200.77, 9,938.80 and 4,810.86 is: 6,640.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200.77 : 9,938.80 = 4,810.86 : x
  2. Step 2: Convert to fraction form
    7,200.77/9,938.80 = 4,810.86/x
  3. Step 3: Cross multiply
    7,200.77x = 9,938.80 × 4,810.86
  4. Step 4: Simplify right side
    7,200.77x = 47,814,151.31
  5. Step 5: Solve for x
    x = 47,814,151.31/7,200.77
  6. Step 6: Final answer
    x = 6,640.15

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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.