Home / 21,010.88-28,966.80-18,013.76

Finding the Fourth Proportional to 21,010.88, 28,966.80 and 18,013.76

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Solution

The fourth proportional to 21,010.88, 28,966.80 and 18,013.76 is: 24,834.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.88 : 28,966.80 = 18,013.76 : x
  2. Step 2: Convert to fraction form
    21,010.88/28,966.80 = 18,013.76/x
  3. Step 3: Cross multiply
    21,010.88x = 28,966.80 × 18,013.76
  4. Step 4: Simplify right side
    21,010.88x = 521,800,983.17
  5. Step 5: Solve for x
    x = 521,800,983.17/21,010.88
  6. Step 6: Final answer
    x = 24,834.80

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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.