Home / 20,740.64-31,118.64-9,653.28

Finding the Fourth Proportional to 20,740.64, 31,118.64 and 9,653.28

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Solution

The fourth proportional to 20,740.64, 31,118.64 and 9,653.28 is: 14,483.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.64 : 31,118.64 = 9,653.28 : x
  2. Step 2: Convert to fraction form
    20,740.64/31,118.64 = 9,653.28/x
  3. Step 3: Cross multiply
    20,740.64x = 31,118.64 × 9,653.28
  4. Step 4: Simplify right side
    20,740.64x = 300,396,945.14
  5. Step 5: Solve for x
    x = 300,396,945.14/20,740.64
  6. Step 6: Final answer
    x = 14,483.49

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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.