Home / 20,135.40-27,782.43-12,177.45

Finding the Fourth Proportional to 20,135.40, 27,782.43 and 12,177.45

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Solution

The fourth proportional to 20,135.40, 27,782.43 and 12,177.45 is: 16,802.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.40 : 27,782.43 = 12,177.45 : x
  2. Step 2: Convert to fraction form
    20,135.40/27,782.43 = 12,177.45/x
  3. Step 3: Cross multiply
    20,135.40x = 27,782.43 × 12,177.45
  4. Step 4: Simplify right side
    20,135.40x = 338,319,152.20
  5. Step 5: Solve for x
    x = 338,319,152.20/20,135.40
  6. Step 6: Final answer
    x = 16,802.21

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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.