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Finding the Fourth Proportional to 28,202.40, 42,305.04 and 7,425.36

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Solution

The fourth proportional to 28,202.40, 42,305.04 and 7,425.36 is: 11,138.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,202.40 : 42,305.04 = 7,425.36 : x
  2. Step 2: Convert to fraction form
    28,202.40/42,305.04 = 7,425.36/x
  3. Step 3: Cross multiply
    28,202.40x = 42,305.04 × 7,425.36
  4. Step 4: Simplify right side
    28,202.40x = 314,130,151.81
  5. Step 5: Solve for x
    x = 314,130,151.81/28,202.40
  6. Step 6: Final answer
    x = 11,138.42

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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.