Home / 10,085.79-15,128.70-2,690.83

Finding the Fourth Proportional to 10,085.79, 15,128.70 and 2,690.83

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Solution

The fourth proportional to 10,085.79, 15,128.70 and 2,690.83 is: 4,036.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,085.79 : 15,128.70 = 2,690.83 : x
  2. Step 2: Convert to fraction form
    10,085.79/15,128.70 = 2,690.83/x
  3. Step 3: Cross multiply
    10,085.79x = 15,128.70 × 2,690.83
  4. Step 4: Simplify right side
    10,085.79x = 40,708,759.82
  5. Step 5: Solve for x
    x = 40,708,759.82/10,085.79
  6. Step 6: Final answer
    x = 4,036.25

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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.