Home / 20,776.58-28,672.28-11,345.76

Finding the Fourth Proportional to 20,776.58, 28,672.28 and 11,345.76

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Solution

The fourth proportional to 20,776.58, 28,672.28 and 11,345.76 is: 15,657.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.58 : 28,672.28 = 11,345.76 : x
  2. Step 2: Convert to fraction form
    20,776.58/28,672.28 = 11,345.76/x
  3. Step 3: Cross multiply
    20,776.58x = 28,672.28 × 11,345.76
  4. Step 4: Simplify right side
    20,776.58x = 325,308,807.53
  5. Step 5: Solve for x
    x = 325,308,807.53/20,776.58
  6. Step 6: Final answer
    x = 15,657.48

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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.