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Finding the Fourth Proportional to 28,497.69, 39,326.64 and 15,751.77

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Solution

The fourth proportional to 28,497.69, 39,326.64 and 15,751.77 is: 21,737.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,497.69 : 39,326.64 = 15,751.77 : x
  2. Step 2: Convert to fraction form
    28,497.69/39,326.64 = 15,751.77/x
  3. Step 3: Cross multiply
    28,497.69x = 39,326.64 × 15,751.77
  4. Step 4: Simplify right side
    28,497.69x = 619,464,188.15
  5. Step 5: Solve for x
    x = 619,464,188.15/28,497.69
  6. Step 6: Final answer
    x = 21,737.35

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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.