Home / 20,295.68-28,009.12-11,343.40

Finding the Fourth Proportional to 20,295.68, 28,009.12 and 11,343.40

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Solution

The fourth proportional to 20,295.68, 28,009.12 and 11,343.40 is: 15,654.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.68 : 28,009.12 = 11,343.40 : x
  2. Step 2: Convert to fraction form
    20,295.68/28,009.12 = 11,343.40/x
  3. Step 3: Cross multiply
    20,295.68x = 28,009.12 × 11,343.40
  4. Step 4: Simplify right side
    20,295.68x = 317,718,651.81
  5. Step 5: Solve for x
    x = 317,718,651.81/20,295.68
  6. Step 6: Final answer
    x = 15,654.50

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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.