Home / 20,970.16-31,460.64-6,178.48

Finding the Fourth Proportional to 20,970.16, 31,460.64 and 6,178.48

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Solution

The fourth proportional to 20,970.16, 31,460.64 and 6,178.48 is: 9,269.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.16 : 31,460.64 = 6,178.48 : x
  2. Step 2: Convert to fraction form
    20,970.16/31,460.64 = 6,178.48/x
  3. Step 3: Cross multiply
    20,970.16x = 31,460.64 × 6,178.48
  4. Step 4: Simplify right side
    20,970.16x = 194,378,935.03
  5. Step 5: Solve for x
    x = 194,378,935.03/20,970.16
  6. Step 6: Final answer
    x = 9,269.31

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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.