Home / 21,215.28-31,827-8,066.60

Finding the Fourth Proportional to 21,215.28, 31,827 and 8,066.60

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Solution

The fourth proportional to 21,215.28, 31,827 and 8,066.60 is: 12,101.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.28 : 31,827 = 8,066.60 : x
  2. Step 2: Convert to fraction form
    21,215.28/31,827 = 8,066.60/x
  3. Step 3: Cross multiply
    21,215.28x = 31,827 × 8,066.60
  4. Step 4: Simplify right side
    21,215.28x = 256,735,678.20
  5. Step 5: Solve for x
    x = 256,735,678.20/21,215.28
  6. Step 6: Final answer
    x = 12,101.45

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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.