Home / 20,123.28-27,780.12-12,573.80

Finding the Fourth Proportional to 20,123.28, 27,780.12 and 12,573.80

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Solution

The fourth proportional to 20,123.28, 27,780.12 and 12,573.80 is: 17,358.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.28 : 27,780.12 = 12,573.80 : x
  2. Step 2: Convert to fraction form
    20,123.28/27,780.12 = 12,573.80/x
  3. Step 3: Cross multiply
    20,123.28x = 27,780.12 × 12,573.80
  4. Step 4: Simplify right side
    20,123.28x = 349,301,533.96
  5. Step 5: Solve for x
    x = 349,301,533.96/20,123.28
  6. Step 6: Final answer
    x = 17,358.08

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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.