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Finding the Fourth Proportional to 13,567.49, 18,721.49 and 7,903.16

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Solution

The fourth proportional to 13,567.49, 18,721.49 and 7,903.16 is: 10,905.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,567.49 : 18,721.49 = 7,903.16 : x
  2. Step 2: Convert to fraction form
    13,567.49/18,721.49 = 7,903.16/x
  3. Step 3: Cross multiply
    13,567.49x = 18,721.49 × 7,903.16
  4. Step 4: Simplify right side
    13,567.49x = 147,958,930.91
  5. Step 5: Solve for x
    x = 147,958,930.91/13,567.49
  6. Step 6: Final answer
    x = 10,905.40

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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.