Home / 10,871.80-16,307.70-7,129.60

Finding the Fourth Proportional to 10,871.80, 16,307.70 and 7,129.60

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Solution

The fourth proportional to 10,871.80, 16,307.70 and 7,129.60 is: 10,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,871.80 : 16,307.70 = 7,129.60 : x
  2. Step 2: Convert to fraction form
    10,871.80/16,307.70 = 7,129.60/x
  3. Step 3: Cross multiply
    10,871.80x = 16,307.70 × 7,129.60
  4. Step 4: Simplify right side
    10,871.80x = 116,267,377.92
  5. Step 5: Solve for x
    x = 116,267,377.92/10,871.80
  6. Step 6: Final answer
    x = 10,694.40

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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.