Home / 21,153.66-31,728.69-8,670.12

Finding the Fourth Proportional to 21,153.66, 31,728.69 and 8,670.12

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Solution

The fourth proportional to 21,153.66, 31,728.69 and 8,670.12 is: 13,004.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.66 : 31,728.69 = 8,670.12 : x
  2. Step 2: Convert to fraction form
    21,153.66/31,728.69 = 8,670.12/x
  3. Step 3: Cross multiply
    21,153.66x = 31,728.69 × 8,670.12
  4. Step 4: Simplify right side
    21,153.66x = 275,091,549.74
  5. Step 5: Solve for x
    x = 275,091,549.74/21,153.66
  6. Step 6: Final answer
    x = 13,004.44

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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.