Home / 7,172.48-9,885.84-5,470.40

Finding the Fourth Proportional to 7,172.48, 9,885.84 and 5,470.40

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Solution

The fourth proportional to 7,172.48, 9,885.84 and 5,470.40 is: 7,539.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.48 : 9,885.84 = 5,470.40 : x
  2. Step 2: Convert to fraction form
    7,172.48/9,885.84 = 5,470.40/x
  3. Step 3: Cross multiply
    7,172.48x = 9,885.84 × 5,470.40
  4. Step 4: Simplify right side
    7,172.48x = 54,079,499.14
  5. Step 5: Solve for x
    x = 54,079,499.14/7,172.48
  6. Step 6: Final answer
    x = 7,539.86

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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.