Home / 20,816.10-31,196.43-7,656.30

Finding the Fourth Proportional to 20,816.10, 31,196.43 and 7,656.30

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Solution

The fourth proportional to 20,816.10, 31,196.43 and 7,656.30 is: 11,474.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.10 : 31,196.43 = 7,656.30 : x
  2. Step 2: Convert to fraction form
    20,816.10/31,196.43 = 7,656.30/x
  3. Step 3: Cross multiply
    20,816.10x = 31,196.43 × 7,656.30
  4. Step 4: Simplify right side
    20,816.10x = 238,849,227.01
  5. Step 5: Solve for x
    x = 238,849,227.01/20,816.10
  6. Step 6: Final answer
    x = 11,474.25

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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.