Home / 28,590.76-42,878.37-11,947.31

Finding the Fourth Proportional to 28,590.76, 42,878.37 and 11,947.31

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Solution

The fourth proportional to 28,590.76, 42,878.37 and 11,947.31 is: 17,917.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,590.76 : 42,878.37 = 11,947.31 : x
  2. Step 2: Convert to fraction form
    28,590.76/42,878.37 = 11,947.31/x
  3. Step 3: Cross multiply
    28,590.76x = 42,878.37 × 11,947.31
  4. Step 4: Simplify right side
    28,590.76x = 512,281,178.68
  5. Step 5: Solve for x
    x = 512,281,178.68/28,590.76
  6. Step 6: Final answer
    x = 17,917.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.