Home / 21,276.91-31,915.32-6,485.95

Finding the Fourth Proportional to 21,276.91, 31,915.32 and 6,485.95

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Solution

The fourth proportional to 21,276.91, 31,915.32 and 6,485.95 is: 9,728.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.91 : 31,915.32 = 6,485.95 : x
  2. Step 2: Convert to fraction form
    21,276.91/31,915.32 = 6,485.95/x
  3. Step 3: Cross multiply
    21,276.91x = 31,915.32 × 6,485.95
  4. Step 4: Simplify right side
    21,276.91x = 207,001,169.75
  5. Step 5: Solve for x
    x = 207,001,169.75/21,276.91
  6. Step 6: Final answer
    x = 9,728.91

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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.