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Finding the Fourth Proportional to 13,208.68, 18,235.70 and 7,905.16

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Solution

The fourth proportional to 13,208.68, 18,235.70 and 7,905.16 is: 10,913.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,208.68 : 18,235.70 = 7,905.16 : x
  2. Step 2: Convert to fraction form
    13,208.68/18,235.70 = 7,905.16/x
  3. Step 3: Cross multiply
    13,208.68x = 18,235.70 × 7,905.16
  4. Step 4: Simplify right side
    13,208.68x = 144,156,126.21
  5. Step 5: Solve for x
    x = 144,156,126.21/13,208.68
  6. Step 6: Final answer
    x = 10,913.74

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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.