Home / 15,077.87-20,809.85-9,110.40

Finding the Fourth Proportional to 15,077.87, 20,809.85 and 9,110.40

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Solution

The fourth proportional to 15,077.87, 20,809.85 and 9,110.40 is: 12,573.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,077.87 : 20,809.85 = 9,110.40 : x
  2. Step 2: Convert to fraction form
    15,077.87/20,809.85 = 9,110.40/x
  3. Step 3: Cross multiply
    15,077.87x = 20,809.85 × 9,110.40
  4. Step 4: Simplify right side
    15,077.87x = 189,586,057.44
  5. Step 5: Solve for x
    x = 189,586,057.44/15,077.87
  6. Step 6: Final answer
    x = 12,573.80

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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.