Home / 12,505.20-18,732.60-7,810.80

Finding the Fourth Proportional to 12,505.20, 18,732.60 and 7,810.80

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Solution

The fourth proportional to 12,505.20, 18,732.60 and 7,810.80 is: 11,700.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.20 : 18,732.60 = 7,810.80 : x
  2. Step 2: Convert to fraction form
    12,505.20/18,732.60 = 7,810.80/x
  3. Step 3: Cross multiply
    12,505.20x = 18,732.60 × 7,810.80
  4. Step 4: Simplify right side
    12,505.20x = 146,316,592.08
  5. Step 5: Solve for x
    x = 146,316,592.08/12,505.20
  6. Step 6: Final answer
    x = 11,700.46

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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.