Home / 20,507.84-28,298.56-11,555.12

Finding the Fourth Proportional to 20,507.84, 28,298.56 and 11,555.12

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Solution

The fourth proportional to 20,507.84, 28,298.56 and 11,555.12 is: 15,944.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,507.84 : 28,298.56 = 11,555.12 : x
  2. Step 2: Convert to fraction form
    20,507.84/28,298.56 = 11,555.12/x
  3. Step 3: Cross multiply
    20,507.84x = 28,298.56 × 11,555.12
  4. Step 4: Simplify right side
    20,507.84x = 326,993,256.63
  5. Step 5: Solve for x
    x = 326,993,256.63/20,507.84
  6. Step 6: Final answer
    x = 15,944.79

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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.