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Finding the Fourth Proportional to 8,869.80, 13,304.70 and 7,776.30

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Solution

The fourth proportional to 8,869.80, 13,304.70 and 7,776.30 is: 11,664.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,869.80 : 13,304.70 = 7,776.30 : x
  2. Step 2: Convert to fraction form
    8,869.80/13,304.70 = 7,776.30/x
  3. Step 3: Cross multiply
    8,869.80x = 13,304.70 × 7,776.30
  4. Step 4: Simplify right side
    8,869.80x = 103,461,338.61
  5. Step 5: Solve for x
    x = 103,461,338.61/8,869.80
  6. Step 6: Final answer
    x = 11,664.45

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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.