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Finding the Fourth Proportional to 13,308.84, 18,364.19 and 7,643.84

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Solution

The fourth proportional to 13,308.84, 18,364.19 and 7,643.84 is: 10,547.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,308.84 : 18,364.19 = 7,643.84 : x
  2. Step 2: Convert to fraction form
    13,308.84/18,364.19 = 7,643.84/x
  3. Step 3: Cross multiply
    13,308.84x = 18,364.19 × 7,643.84
  4. Step 4: Simplify right side
    13,308.84x = 140,372,800.05
  5. Step 5: Solve for x
    x = 140,372,800.05/13,308.84
  6. Step 6: Final answer
    x = 10,547.34

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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.