Home / 20,909.77-28,854.71-11,349.45

Finding the Fourth Proportional to 20,909.77, 28,854.71 and 11,349.45

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Solution

The fourth proportional to 20,909.77, 28,854.71 and 11,349.45 is: 15,661.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.77 : 28,854.71 = 11,349.45 : x
  2. Step 2: Convert to fraction form
    20,909.77/28,854.71 = 11,349.45/x
  3. Step 3: Cross multiply
    20,909.77x = 28,854.71 × 11,349.45
  4. Step 4: Simplify right side
    20,909.77x = 327,485,031.66
  5. Step 5: Solve for x
    x = 327,485,031.66/20,909.77
  6. Step 6: Final answer
    x = 15,661.82

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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.