Home / 20,712.52-28,583.61-11,281.08

Finding the Fourth Proportional to 20,712.52, 28,583.61 and 11,281.08

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Solution

The fourth proportional to 20,712.52, 28,583.61 and 11,281.08 is: 15,568.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.52 : 28,583.61 = 11,281.08 : x
  2. Step 2: Convert to fraction form
    20,712.52/28,583.61 = 11,281.08/x
  3. Step 3: Cross multiply
    20,712.52x = 28,583.61 × 11,281.08
  4. Step 4: Simplify right side
    20,712.52x = 322,453,948.79
  5. Step 5: Solve for x
    x = 322,453,948.79/20,712.52
  6. Step 6: Final answer
    x = 15,568.07

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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.