Home / 20,581.74-28,403.32-12,619.34

Finding the Fourth Proportional to 20,581.74, 28,403.32 and 12,619.34

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Solution

The fourth proportional to 20,581.74, 28,403.32 and 12,619.34 is: 17,415.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.74 : 28,403.32 = 12,619.34 : x
  2. Step 2: Convert to fraction form
    20,581.74/28,403.32 = 12,619.34/x
  3. Step 3: Cross multiply
    20,581.74x = 28,403.32 × 12,619.34
  4. Step 4: Simplify right side
    20,581.74x = 358,431,152.21
  5. Step 5: Solve for x
    x = 358,431,152.21/20,581.74
  6. Step 6: Final answer
    x = 17,415.01

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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.