Home / 21,001.28-28,968.94-12,497.69

Finding the Fourth Proportional to 21,001.28, 28,968.94 and 12,497.69

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Solution

The fourth proportional to 21,001.28, 28,968.94 and 12,497.69 is: 17,239.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.28 : 28,968.94 = 12,497.69 : x
  2. Step 2: Convert to fraction form
    21,001.28/28,968.94 = 12,497.69/x
  3. Step 3: Cross multiply
    21,001.28x = 28,968.94 × 12,497.69
  4. Step 4: Simplify right side
    21,001.28x = 362,044,919.79
  5. Step 5: Solve for x
    x = 362,044,919.79/21,001.28
  6. Step 6: Final answer
    x = 17,239.19

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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.