Home / 19,931.06-27,505.07-10,978.85

Finding the Fourth Proportional to 19,931.06, 27,505.07 and 10,978.85

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Solution

The fourth proportional to 19,931.06, 27,505.07 and 10,978.85 is: 15,150.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.06 : 27,505.07 = 10,978.85 : x
  2. Step 2: Convert to fraction form
    19,931.06/27,505.07 = 10,978.85/x
  3. Step 3: Cross multiply
    19,931.06x = 27,505.07 × 10,978.85
  4. Step 4: Simplify right side
    19,931.06x = 301,973,845.35
  5. Step 5: Solve for x
    x = 301,973,845.35/19,931.06
  6. Step 6: Final answer
    x = 15,150.92

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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.