Home / 20,968.64-31,453.28-5,386.28

Finding the Fourth Proportional to 20,968.64, 31,453.28 and 5,386.28

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Solution

The fourth proportional to 20,968.64, 31,453.28 and 5,386.28 is: 8,079.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.64 : 31,453.28 = 5,386.28 : x
  2. Step 2: Convert to fraction form
    20,968.64/31,453.28 = 5,386.28/x
  3. Step 3: Cross multiply
    20,968.64x = 31,453.28 × 5,386.28
  4. Step 4: Simplify right side
    20,968.64x = 169,416,173.00
  5. Step 5: Solve for x
    x = 169,416,173.00/20,968.64
  6. Step 6: Final answer
    x = 8,079.50

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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.