Home / 21,006.63-28,988.15-12,057.35

Finding the Fourth Proportional to 21,006.63, 28,988.15 and 12,057.35

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Solution

The fourth proportional to 21,006.63, 28,988.15 and 12,057.35 is: 16,638.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.63 : 28,988.15 = 12,057.35 : x
  2. Step 2: Convert to fraction form
    21,006.63/28,988.15 = 12,057.35/x
  3. Step 3: Cross multiply
    21,006.63x = 28,988.15 × 12,057.35
  4. Step 4: Simplify right side
    21,006.63x = 349,520,065.18
  5. Step 5: Solve for x
    x = 349,520,065.18/21,006.63
  6. Step 6: Final answer
    x = 16,638.56

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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.