Home / 19,931.28-27,503.88-11,431.56

Finding the Fourth Proportional to 19,931.28, 27,503.88 and 11,431.56

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Solution

The fourth proportional to 19,931.28, 27,503.88 and 11,431.56 is: 15,774.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.28 : 27,503.88 = 11,431.56 : x
  2. Step 2: Convert to fraction form
    19,931.28/27,503.88 = 11,431.56/x
  3. Step 3: Cross multiply
    19,931.28x = 27,503.88 × 11,431.56
  4. Step 4: Simplify right side
    19,931.28x = 314,412,254.45
  5. Step 5: Solve for x
    x = 314,412,254.45/19,931.28
  6. Step 6: Final answer
    x = 15,774.81

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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.