Home / 28,976.60-39,973.60-18,900.47

Finding the Fourth Proportional to 28,976.60, 39,973.60 and 18,900.47

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Solution

The fourth proportional to 28,976.60, 39,973.60 and 18,900.47 is: 26,073.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,976.60 : 39,973.60 = 18,900.47 : x
  2. Step 2: Convert to fraction form
    28,976.60/39,973.60 = 18,900.47/x
  3. Step 3: Cross multiply
    28,976.60x = 39,973.60 × 18,900.47
  4. Step 4: Simplify right side
    28,976.60x = 755,519,951.15
  5. Step 5: Solve for x
    x = 755,519,951.15/28,976.60
  6. Step 6: Final answer
    x = 26,073.45

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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.