Home / 20,297.86-28,012.35-11,345.74

Finding the Fourth Proportional to 20,297.86, 28,012.35 and 11,345.74

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Solution

The fourth proportional to 20,297.86, 28,012.35 and 11,345.74 is: 15,657.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,297.86 : 28,012.35 = 11,345.74 : x
  2. Step 2: Convert to fraction form
    20,297.86/28,012.35 = 11,345.74/x
  3. Step 3: Cross multiply
    20,297.86x = 28,012.35 × 11,345.74
  4. Step 4: Simplify right side
    20,297.86x = 317,820,699.83
  5. Step 5: Solve for x
    x = 317,820,699.83/20,297.86
  6. Step 6: Final answer
    x = 15,657.85

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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.