Home / 21,013.58-28,989.55-15,043.07

Finding the Fourth Proportional to 21,013.58, 28,989.55 and 15,043.07

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Solution

The fourth proportional to 21,013.58, 28,989.55 and 15,043.07 is: 20,752.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.58 : 28,989.55 = 15,043.07 : x
  2. Step 2: Convert to fraction form
    21,013.58/28,989.55 = 15,043.07/x
  3. Step 3: Cross multiply
    21,013.58x = 28,989.55 × 15,043.07
  4. Step 4: Simplify right side
    21,013.58x = 436,091,829.92
  5. Step 5: Solve for x
    x = 436,091,829.92/21,013.58
  6. Step 6: Final answer
    x = 20,752.86

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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.