Home / 20,869.96-31,280.64-7,709.08

Finding the Fourth Proportional to 20,869.96, 31,280.64 and 7,709.08

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Solution

The fourth proportional to 20,869.96, 31,280.64 and 7,709.08 is: 11,554.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.96 : 31,280.64 = 7,709.08 : x
  2. Step 2: Convert to fraction form
    20,869.96/31,280.64 = 7,709.08/x
  3. Step 3: Cross multiply
    20,869.96x = 31,280.64 × 7,709.08
  4. Step 4: Simplify right side
    20,869.96x = 241,144,956.21
  5. Step 5: Solve for x
    x = 241,144,956.21/20,869.96
  6. Step 6: Final answer
    x = 11,554.64

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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.