Home / 20,990.65-28,966.59-12,037.58

Finding the Fourth Proportional to 20,990.65, 28,966.59 and 12,037.58

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Solution

The fourth proportional to 20,990.65, 28,966.59 and 12,037.58 is: 16,611.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.65 : 28,966.59 = 12,037.58 : x
  2. Step 2: Convert to fraction form
    20,990.65/28,966.59 = 12,037.58/x
  3. Step 3: Cross multiply
    20,990.65x = 28,966.59 × 12,037.58
  4. Step 4: Simplify right side
    20,990.65x = 348,687,563.77
  5. Step 5: Solve for x
    x = 348,687,563.77/20,990.65
  6. Step 6: Final answer
    x = 16,611.57

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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.