Home / 20,445.20-30,643.74-11,686.16

Finding the Fourth Proportional to 20,445.20, 30,643.74 and 11,686.16

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Solution

The fourth proportional to 20,445.20, 30,643.74 and 11,686.16 is: 17,515.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.20 : 30,643.74 = 11,686.16 : x
  2. Step 2: Convert to fraction form
    20,445.20/30,643.74 = 11,686.16/x
  3. Step 3: Cross multiply
    20,445.20x = 30,643.74 × 11,686.16
  4. Step 4: Simplify right side
    20,445.20x = 358,107,648.64
  5. Step 5: Solve for x
    x = 358,107,648.64/20,445.20
  6. Step 6: Final answer
    x = 17,515.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.