Home / 20,509.89-28,297.35-12,543.81

Finding the Fourth Proportional to 20,509.89, 28,297.35 and 12,543.81

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Solution

The fourth proportional to 20,509.89, 28,297.35 and 12,543.81 is: 17,306.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.89 : 28,297.35 = 12,543.81 : x
  2. Step 2: Convert to fraction form
    20,509.89/28,297.35 = 12,543.81/x
  3. Step 3: Cross multiply
    20,509.89x = 28,297.35 × 12,543.81
  4. Step 4: Simplify right side
    20,509.89x = 354,956,581.90
  5. Step 5: Solve for x
    x = 354,956,581.90/20,509.89
  6. Step 6: Final answer
    x = 17,306.61

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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.