Home / 21,246.40-31,876.56-6,455.92

Finding the Fourth Proportional to 21,246.40, 31,876.56 and 6,455.92

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Solution

The fourth proportional to 21,246.40, 31,876.56 and 6,455.92 is: 9,685.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,246.40 : 31,876.56 = 6,455.92 : x
  2. Step 2: Convert to fraction form
    21,246.40/31,876.56 = 6,455.92/x
  3. Step 3: Cross multiply
    21,246.40x = 31,876.56 × 6,455.92
  4. Step 4: Simplify right side
    21,246.40x = 205,792,521.24
  5. Step 5: Solve for x
    x = 205,792,521.24/21,246.40
  6. Step 6: Final answer
    x = 9,685.99

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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.