Home / 20,784.48-28,683.36-11,353.11

Finding the Fourth Proportional to 20,784.48, 28,683.36 and 11,353.11

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Solution

The fourth proportional to 20,784.48, 28,683.36 and 11,353.11 is: 15,667.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.48 : 28,683.36 = 11,353.11 : x
  2. Step 2: Convert to fraction form
    20,784.48/28,683.36 = 11,353.11/x
  3. Step 3: Cross multiply
    20,784.48x = 28,683.36 × 11,353.11
  4. Step 4: Simplify right side
    20,784.48x = 325,645,341.25
  5. Step 5: Solve for x
    x = 325,645,341.25/20,784.48
  6. Step 6: Final answer
    x = 15,667.72

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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.