Home / 20,807.23-28,715.73-12,740.85

Finding the Fourth Proportional to 20,807.23, 28,715.73 and 12,740.85

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Solution

The fourth proportional to 20,807.23, 28,715.73 and 12,740.85 is: 17,583.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.23 : 28,715.73 = 12,740.85 : x
  2. Step 2: Convert to fraction form
    20,807.23/28,715.73 = 12,740.85/x
  3. Step 3: Cross multiply
    20,807.23x = 28,715.73 × 12,740.85
  4. Step 4: Simplify right side
    20,807.23x = 365,862,601.29
  5. Step 5: Solve for x
    x = 365,862,601.29/20,807.23
  6. Step 6: Final answer
    x = 17,583.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.