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Finding the Fourth Proportional to 7,430, 10,253.40 and 4,118

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Solution

The fourth proportional to 7,430, 10,253.40 and 4,118 is: 5,682.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,430 : 10,253.40 = 4,118 : x
  2. Step 2: Convert to fraction form
    7,430/10,253.40 = 4,118/x
  3. Step 3: Cross multiply
    7,430x = 10,253.40 × 4,118
  4. Step 4: Simplify right side
    7,430x = 42,223,501.20
  5. Step 5: Solve for x
    x = 42,223,501.20/7,430
  6. Step 6: Final answer
    x = 5,682.84

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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.