Home / 20,931.93-28,886.99-11,500.83

Finding the Fourth Proportional to 20,931.93, 28,886.99 and 11,500.83

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Solution

The fourth proportional to 20,931.93, 28,886.99 and 11,500.83 is: 15,871.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.93 : 28,886.99 = 11,500.83 : x
  2. Step 2: Convert to fraction form
    20,931.93/28,886.99 = 11,500.83/x
  3. Step 3: Cross multiply
    20,931.93x = 28,886.99 × 11,500.83
  4. Step 4: Simplify right side
    20,931.93x = 332,224,303.70
  5. Step 5: Solve for x
    x = 332,224,303.70/20,931.93
  6. Step 6: Final answer
    x = 15,871.65

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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.