Home / 10,828.40-16,242.60-7,890.80

Finding the Fourth Proportional to 10,828.40, 16,242.60 and 7,890.80

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Solution

The fourth proportional to 10,828.40, 16,242.60 and 7,890.80 is: 11,836.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,828.40 : 16,242.60 = 7,890.80 : x
  2. Step 2: Convert to fraction form
    10,828.40/16,242.60 = 7,890.80/x
  3. Step 3: Cross multiply
    10,828.40x = 16,242.60 × 7,890.80
  4. Step 4: Simplify right side
    10,828.40x = 128,167,108.08
  5. Step 5: Solve for x
    x = 128,167,108.08/10,828.40
  6. Step 6: Final answer
    x = 11,836.20

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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.