Home / 21,155.17-31,670.43-15,633.20

Finding the Fourth Proportional to 21,155.17, 31,670.43 and 15,633.20

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Solution

The fourth proportional to 21,155.17, 31,670.43 and 15,633.20 is: 23,403.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.17 : 31,670.43 = 15,633.20 : x
  2. Step 2: Convert to fraction form
    21,155.17/31,670.43 = 15,633.20/x
  3. Step 3: Cross multiply
    21,155.17x = 31,670.43 × 15,633.20
  4. Step 4: Simplify right side
    21,155.17x = 495,110,007.92
  5. Step 5: Solve for x
    x = 495,110,007.92/21,155.17
  6. Step 6: Final answer
    x = 23,403.74

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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.