Home / 20,506.77-28,306.35-12,751.65

Finding the Fourth Proportional to 20,506.77, 28,306.35 and 12,751.65

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Solution

The fourth proportional to 20,506.77, 28,306.35 and 12,751.65 is: 17,601.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,506.77 : 28,306.35 = 12,751.65 : x
  2. Step 2: Convert to fraction form
    20,506.77/28,306.35 = 12,751.65/x
  3. Step 3: Cross multiply
    20,506.77x = 28,306.35 × 12,751.65
  4. Step 4: Simplify right side
    20,506.77x = 360,952,667.98
  5. Step 5: Solve for x
    x = 360,952,667.98/20,506.77
  6. Step 6: Final answer
    x = 17,601.63

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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.