Home / 28,013.76-38,642.40-19,667.52

Finding the Fourth Proportional to 28,013.76, 38,642.40 and 19,667.52

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Solution

The fourth proportional to 28,013.76, 38,642.40 and 19,667.52 is: 27,129.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,013.76 : 38,642.40 = 19,667.52 : x
  2. Step 2: Convert to fraction form
    28,013.76/38,642.40 = 19,667.52/x
  3. Step 3: Cross multiply
    28,013.76x = 38,642.40 × 19,667.52
  4. Step 4: Simplify right side
    28,013.76x = 760,000,174.85
  5. Step 5: Solve for x
    x = 760,000,174.85/28,013.76
  6. Step 6: Final answer
    x = 27,129.53

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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.