Home / 28,145.52-38,841.60-15,571.12

Finding the Fourth Proportional to 28,145.52, 38,841.60 and 15,571.12

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Solution

The fourth proportional to 28,145.52, 38,841.60 and 15,571.12 is: 21,488.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.52 : 38,841.60 = 15,571.12 : x
  2. Step 2: Convert to fraction form
    28,145.52/38,841.60 = 15,571.12/x
  3. Step 3: Cross multiply
    28,145.52x = 38,841.60 × 15,571.12
  4. Step 4: Simplify right side
    28,145.52x = 604,807,214.59
  5. Step 5: Solve for x
    x = 604,807,214.59/28,145.52
  6. Step 6: Final answer
    x = 21,488.58

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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.