Home / 20,856.05-28,781.20-11,295.71

Finding the Fourth Proportional to 20,856.05, 28,781.20 and 11,295.71

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Solution

The fourth proportional to 20,856.05, 28,781.20 and 11,295.71 is: 15,588.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.05 : 28,781.20 = 11,295.71 : x
  2. Step 2: Convert to fraction form
    20,856.05/28,781.20 = 11,295.71/x
  3. Step 3: Cross multiply
    20,856.05x = 28,781.20 × 11,295.71
  4. Step 4: Simplify right side
    20,856.05x = 325,104,088.65
  5. Step 5: Solve for x
    x = 325,104,088.65/20,856.05
  6. Step 6: Final answer
    x = 15,588.00

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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.