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Finding the Fourth Proportional to 7,259.67, 9,953.06 and 7,128.45

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Solution

The fourth proportional to 7,259.67, 9,953.06 and 7,128.45 is: 9,773.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,259.67 : 9,953.06 = 7,128.45 : x
  2. Step 2: Convert to fraction form
    7,259.67/9,953.06 = 7,128.45/x
  3. Step 3: Cross multiply
    7,259.67x = 9,953.06 × 7,128.45
  4. Step 4: Simplify right side
    7,259.67x = 70,949,854.91
  5. Step 5: Solve for x
    x = 70,949,854.91/7,259.67
  6. Step 6: Final answer
    x = 9,773.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.