Home / 10,647.84-15,970.08-2,857.28

Finding the Fourth Proportional to 10,647.84, 15,970.08 and 2,857.28

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Solution

The fourth proportional to 10,647.84, 15,970.08 and 2,857.28 is: 4,285.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,647.84 : 15,970.08 = 2,857.28 : x
  2. Step 2: Convert to fraction form
    10,647.84/15,970.08 = 2,857.28/x
  3. Step 3: Cross multiply
    10,647.84x = 15,970.08 × 2,857.28
  4. Step 4: Simplify right side
    10,647.84x = 45,630,990.18
  5. Step 5: Solve for x
    x = 45,630,990.18/10,647.84
  6. Step 6: Final answer
    x = 4,285.47

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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.