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Finding the Fourth Proportional to 7,505.40, 11,264.90 and 3,810.20

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Solution

The fourth proportional to 7,505.40, 11,264.90 and 3,810.20 is: 5,718.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,505.40 : 11,264.90 = 3,810.20 : x
  2. Step 2: Convert to fraction form
    7,505.40/11,264.90 = 3,810.20/x
  3. Step 3: Cross multiply
    7,505.40x = 11,264.90 × 3,810.20
  4. Step 4: Simplify right side
    7,505.40x = 42,921,521.98
  5. Step 5: Solve for x
    x = 42,921,521.98/7,505.40
  6. Step 6: Final answer
    x = 5,718.75

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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.