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Finding the Fourth Proportional to 28,483.56, 42,724.08 and 9,765.28

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Solution

The fourth proportional to 28,483.56, 42,724.08 and 9,765.28 is: 14,647.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,483.56 : 42,724.08 = 9,765.28 : x
  2. Step 2: Convert to fraction form
    28,483.56/42,724.08 = 9,765.28/x
  3. Step 3: Cross multiply
    28,483.56x = 42,724.08 × 9,765.28
  4. Step 4: Simplify right side
    28,483.56x = 417,212,603.94
  5. Step 5: Solve for x
    x = 417,212,603.94/28,483.56
  6. Step 6: Final answer
    x = 14,647.49

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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.