Home / 23,135.94-31,981.39-20,642.76

Finding the Fourth Proportional to 23,135.94, 31,981.39 and 20,642.76

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Solution

The fourth proportional to 23,135.94, 31,981.39 and 20,642.76 is: 28,535.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,135.94 : 31,981.39 = 20,642.76 : x
  2. Step 2: Convert to fraction form
    23,135.94/31,981.39 = 20,642.76/x
  3. Step 3: Cross multiply
    23,135.94x = 31,981.39 × 20,642.76
  4. Step 4: Simplify right side
    23,135.94x = 660,184,158.24
  5. Step 5: Solve for x
    x = 660,184,158.24/23,135.94
  6. Step 6: Final answer
    x = 28,535.00

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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.