Home / 7,389.40-11,086.80-3,490.88

Finding the Fourth Proportional to 7,389.40, 11,086.80 and 3,490.88

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Solution

The fourth proportional to 7,389.40, 11,086.80 and 3,490.88 is: 5,237.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,389.40 : 11,086.80 = 3,490.88 : x
  2. Step 2: Convert to fraction form
    7,389.40/11,086.80 = 3,490.88/x
  3. Step 3: Cross multiply
    7,389.40x = 11,086.80 × 3,490.88
  4. Step 4: Simplify right side
    7,389.40x = 38,702,688.38
  5. Step 5: Solve for x
    x = 38,702,688.38/7,389.40
  6. Step 6: Final answer
    x = 5,237.60

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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.