Home / 20,124.78-27,782.20-12,575.32

Finding the Fourth Proportional to 20,124.78, 27,782.20 and 12,575.32

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Solution

The fourth proportional to 20,124.78, 27,782.20 and 12,575.32 is: 17,360.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,124.78 : 27,782.20 = 12,575.32 : x
  2. Step 2: Convert to fraction form
    20,124.78/27,782.20 = 12,575.32/x
  3. Step 3: Cross multiply
    20,124.78x = 27,782.20 × 12,575.32
  4. Step 4: Simplify right side
    20,124.78x = 349,370,055.30
  5. Step 5: Solve for x
    x = 349,370,055.30/20,124.78
  6. Step 6: Final answer
    x = 17,360.19

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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.