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Finding the Fourth Proportional to 12,903.18, 17,806.58 and 7,239.18

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Solution

The fourth proportional to 12,903.18, 17,806.58 and 7,239.18 is: 9,990.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,903.18 : 17,806.58 = 7,239.18 : x
  2. Step 2: Convert to fraction form
    12,903.18/17,806.58 = 7,239.18/x
  3. Step 3: Cross multiply
    12,903.18x = 17,806.58 × 7,239.18
  4. Step 4: Simplify right side
    12,903.18x = 128,904,912.58
  5. Step 5: Solve for x
    x = 128,904,912.58/12,903.18
  6. Step 6: Final answer
    x = 9,990.17

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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.