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Finding the Fourth Proportional to 8,810.64, 13,220.28 and 3,618

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Solution

The fourth proportional to 8,810.64, 13,220.28 and 3,618 is: 5,428.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,810.64 : 13,220.28 = 3,618 : x
  2. Step 2: Convert to fraction form
    8,810.64/13,220.28 = 3,618/x
  3. Step 3: Cross multiply
    8,810.64x = 13,220.28 × 3,618
  4. Step 4: Simplify right side
    8,810.64x = 47,830,973.04
  5. Step 5: Solve for x
    x = 47,830,973.04/8,810.64
  6. Step 6: Final answer
    x = 5,428.77

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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.