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Finding the Fourth Proportional to 12,828.66, 17,701.65 and 7,238.58

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Solution

The fourth proportional to 12,828.66, 17,701.65 and 7,238.58 is: 9,988.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,828.66 : 17,701.65 = 7,238.58 : x
  2. Step 2: Convert to fraction form
    12,828.66/17,701.65 = 7,238.58/x
  3. Step 3: Cross multiply
    12,828.66x = 17,701.65 × 7,238.58
  4. Step 4: Simplify right side
    12,828.66x = 128,134,809.66
  5. Step 5: Solve for x
    x = 128,134,809.66/12,828.66
  6. Step 6: Final answer
    x = 9,988.17

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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.