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Finding the Fourth Proportional to 7,487.70, 11,219.40 and 4,709.40

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Solution

The fourth proportional to 7,487.70, 11,219.40 and 4,709.40 is: 7,056.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,487.70 : 11,219.40 = 4,709.40 : x
  2. Step 2: Convert to fraction form
    7,487.70/11,219.40 = 4,709.40/x
  3. Step 3: Cross multiply
    7,487.70x = 11,219.40 × 4,709.40
  4. Step 4: Simplify right side
    7,487.70x = 52,836,642.36
  5. Step 5: Solve for x
    x = 52,836,642.36/7,487.70
  6. Step 6: Final answer
    x = 7,056.46

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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.