Home / 10,128.75-15,119.82-8,750.94

Finding the Fourth Proportional to 10,128.75, 15,119.82 and 8,750.94

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Solution

The fourth proportional to 10,128.75, 15,119.82 and 8,750.94 is: 13,063.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.75 : 15,119.82 = 8,750.94 : x
  2. Step 2: Convert to fraction form
    10,128.75/15,119.82 = 8,750.94/x
  3. Step 3: Cross multiply
    10,128.75x = 15,119.82 × 8,750.94
  4. Step 4: Simplify right side
    10,128.75x = 132,312,637.63
  5. Step 5: Solve for x
    x = 132,312,637.63/10,128.75
  6. Step 6: Final answer
    x = 13,063.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.