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Finding the Fourth Proportional to 28,567.88, 39,386.88 and 18,478.52

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Solution

The fourth proportional to 28,567.88, 39,386.88 and 18,478.52 is: 25,476.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,567.88 : 39,386.88 = 18,478.52 : x
  2. Step 2: Convert to fraction form
    28,567.88/39,386.88 = 18,478.52/x
  3. Step 3: Cross multiply
    28,567.88x = 39,386.88 × 18,478.52
  4. Step 4: Simplify right side
    28,567.88x = 727,811,249.82
  5. Step 5: Solve for x
    x = 727,811,249.82/28,567.88
  6. Step 6: Final answer
    x = 25,476.56

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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.