Home / 20,788.42-28,688.01-11,228.30

Finding the Fourth Proportional to 20,788.42, 28,688.01 and 11,228.30

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Solution

The fourth proportional to 20,788.42, 28,688.01 and 11,228.30 is: 15,495.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.42 : 28,688.01 = 11,228.30 : x
  2. Step 2: Convert to fraction form
    20,788.42/28,688.01 = 11,228.30/x
  3. Step 3: Cross multiply
    20,788.42x = 28,688.01 × 11,228.30
  4. Step 4: Simplify right side
    20,788.42x = 322,117,582.68
  5. Step 5: Solve for x
    x = 322,117,582.68/20,788.42
  6. Step 6: Final answer
    x = 15,495.05

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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.