Home / 20,753.16-28,641.75-11,555.64

Finding the Fourth Proportional to 20,753.16, 28,641.75 and 11,555.64

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Solution

The fourth proportional to 20,753.16, 28,641.75 and 11,555.64 is: 15,948.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.16 : 28,641.75 = 11,555.64 : x
  2. Step 2: Convert to fraction form
    20,753.16/28,641.75 = 11,555.64/x
  3. Step 3: Cross multiply
    20,753.16x = 28,641.75 × 11,555.64
  4. Step 4: Simplify right side
    20,753.16x = 330,973,751.97
  5. Step 5: Solve for x
    x = 330,973,751.97/20,753.16
  6. Step 6: Final answer
    x = 15,948.11

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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.