Home / 15,742.91-21,715.32-9,364.95

Finding the Fourth Proportional to 15,742.91, 21,715.32 and 9,364.95

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Solution

The fourth proportional to 15,742.91, 21,715.32 and 9,364.95 is: 12,917.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.91 : 21,715.32 = 9,364.95 : x
  2. Step 2: Convert to fraction form
    15,742.91/21,715.32 = 9,364.95/x
  3. Step 3: Cross multiply
    15,742.91x = 21,715.32 × 9,364.95
  4. Step 4: Simplify right side
    15,742.91x = 203,362,933.75
  5. Step 5: Solve for x
    x = 203,362,933.75/15,742.91
  6. Step 6: Final answer
    x = 12,917.75

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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.