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Finding the Fourth Proportional to 7,813.76, 10,783.06 and 4,828.92

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Solution

The fourth proportional to 7,813.76, 10,783.06 and 4,828.92 is: 6,663.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,813.76 : 10,783.06 = 4,828.92 : x
  2. Step 2: Convert to fraction form
    7,813.76/10,783.06 = 4,828.92/x
  3. Step 3: Cross multiply
    7,813.76x = 10,783.06 × 4,828.92
  4. Step 4: Simplify right side
    7,813.76x = 52,070,534.10
  5. Step 5: Solve for x
    x = 52,070,534.10/7,813.76
  6. Step 6: Final answer
    x = 6,663.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.