Home / 20,856.48-28,782.24-12,471.36

Finding the Fourth Proportional to 20,856.48, 28,782.24 and 12,471.36

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Solution

The fourth proportional to 20,856.48, 28,782.24 and 12,471.36 is: 17,210.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.48 : 28,782.24 = 12,471.36 : x
  2. Step 2: Convert to fraction form
    20,856.48/28,782.24 = 12,471.36/x
  3. Step 3: Cross multiply
    20,856.48x = 28,782.24 × 12,471.36
  4. Step 4: Simplify right side
    20,856.48x = 358,953,676.65
  5. Step 5: Solve for x
    x = 358,953,676.65/20,856.48
  6. Step 6: Final answer
    x = 17,210.65

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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.