Home / 20,909.51-28,855.05-11,349.40

Finding the Fourth Proportional to 20,909.51, 28,855.05 and 11,349.40

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Solution

The fourth proportional to 20,909.51, 28,855.05 and 11,349.40 is: 15,662.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.51 : 28,855.05 = 11,349.40 : x
  2. Step 2: Convert to fraction form
    20,909.51/28,855.05 = 11,349.40/x
  3. Step 3: Cross multiply
    20,909.51x = 28,855.05 × 11,349.40
  4. Step 4: Simplify right side
    20,909.51x = 327,487,432.33
  5. Step 5: Solve for x
    x = 327,487,432.33/20,909.51
  6. Step 6: Final answer
    x = 15,662.13

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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.