Home / 15,715.32-21,697.38-9,755.75

Finding the Fourth Proportional to 15,715.32, 21,697.38 and 9,755.75

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Solution

The fourth proportional to 15,715.32, 21,697.38 and 9,755.75 is: 13,469.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.32 : 21,697.38 = 9,755.75 : x
  2. Step 2: Convert to fraction form
    15,715.32/21,697.38 = 9,755.75/x
  3. Step 3: Cross multiply
    15,715.32x = 21,697.38 × 9,755.75
  4. Step 4: Simplify right side
    15,715.32x = 211,674,106.45
  5. Step 5: Solve for x
    x = 211,674,106.45/15,715.32
  6. Step 6: Final answer
    x = 13,469.28

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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.