Home / 21,833.28-30,130.32-12,402.48

Finding the Fourth Proportional to 21,833.28, 30,130.32 and 12,402.48

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Solution

The fourth proportional to 21,833.28, 30,130.32 and 12,402.48 is: 17,115.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,833.28 : 30,130.32 = 12,402.48 : x
  2. Step 2: Convert to fraction form
    21,833.28/30,130.32 = 12,402.48/x
  3. Step 3: Cross multiply
    21,833.28x = 30,130.32 × 12,402.48
  4. Step 4: Simplify right side
    21,833.28x = 373,690,691.19
  5. Step 5: Solve for x
    x = 373,690,691.19/21,833.28
  6. Step 6: Final answer
    x = 17,115.65

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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.