Home / 20,509.84-28,301.32-11,557.12

Finding the Fourth Proportional to 20,509.84, 28,301.32 and 11,557.12

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Solution

The fourth proportional to 20,509.84, 28,301.32 and 11,557.12 is: 15,947.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.84 : 28,301.32 = 11,557.12 : x
  2. Step 2: Convert to fraction form
    20,509.84/28,301.32 = 11,557.12/x
  3. Step 3: Cross multiply
    20,509.84x = 28,301.32 × 11,557.12
  4. Step 4: Simplify right side
    20,509.84x = 327,081,751.40
  5. Step 5: Solve for x
    x = 327,081,751.40/20,509.84
  6. Step 6: Final answer
    x = 15,947.55

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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.