Home / 21,834.64-30,132-12,403.28

Finding the Fourth Proportional to 21,834.64, 30,132 and 12,403.28

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Solution

The fourth proportional to 21,834.64, 30,132 and 12,403.28 is: 17,116.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,834.64 : 30,132 = 12,403.28 : x
  2. Step 2: Convert to fraction form
    21,834.64/30,132 = 12,403.28/x
  3. Step 3: Cross multiply
    21,834.64x = 30,132 × 12,403.28
  4. Step 4: Simplify right side
    21,834.64x = 373,735,632.96
  5. Step 5: Solve for x
    x = 373,735,632.96/21,834.64
  6. Step 6: Final answer
    x = 17,116.64

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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.