Home / 10,085.80-15,128.70-2,691.40

Finding the Fourth Proportional to 10,085.80, 15,128.70 and 2,691.40

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Solution

The fourth proportional to 10,085.80, 15,128.70 and 2,691.40 is: 4,037.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,085.80 : 15,128.70 = 2,691.40 : x
  2. Step 2: Convert to fraction form
    10,085.80/15,128.70 = 2,691.40/x
  3. Step 3: Cross multiply
    10,085.80x = 15,128.70 × 2,691.40
  4. Step 4: Simplify right side
    10,085.80x = 40,717,383.18
  5. Step 5: Solve for x
    x = 40,717,383.18/10,085.80
  6. Step 6: Final answer
    x = 4,037.10

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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.