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Finding the Fourth Proportional to 28,040.40, 42,061.68 and 7,263.36

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Solution

The fourth proportional to 28,040.40, 42,061.68 and 7,263.36 is: 10,895.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,040.40 : 42,061.68 = 7,263.36 : x
  2. Step 2: Convert to fraction form
    28,040.40/42,061.68 = 7,263.36/x
  3. Step 3: Cross multiply
    28,040.40x = 42,061.68 × 7,263.36
  4. Step 4: Simplify right side
    28,040.40x = 305,509,124.04
  5. Step 5: Solve for x
    x = 305,509,124.04/28,040.40
  6. Step 6: Final answer
    x = 10,895.32

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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.